alkynylation of terminal alkynes with alkynyl hypervalent ...acetylene gold intermediate 14 to the...

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S1 Supporting Information Computational Study on the 1,3-Diyne Synthesis from Gold(I)-Catalyzed Alkynylation of Terminal Alkynes with Alkynyl Hypervalent Iodine Reagents under the Aid of Silver Complex and 1,10-phenanthroline Yanhong Liu, Yiying Yang, Rongxiu Zhu, * Chengbu Liu, and Dongju Zhang * Key Lab of Colloid and Interface Chemistry, Ministry of Education, Institute of Theoretical Chemistry, School of chemistry and chemical engineering, Shandong University, Jinan 250100, P. R. China Electronic Supplementary Material (ESI) for Catalysis Science & Technology. This journal is © The Royal Society of Chemistry 2019

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Page 1: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S1

Supporting Information

Computational Study on the 1,3-Diyne Synthesis from Gold(I)-Catalyzed

Alkynylation of Terminal Alkynes with Alkynyl Hypervalent Iodine Reagents

under the Aid of Silver Complex and 1,10-phenanthroline

Yanhong Liu, Yiying Yang, Rongxiu Zhu,* Chengbu Liu, and Dongju Zhang*

Key Lab of Colloid and Interface Chemistry, Ministry of Education, Institute of Theoretical

Chemistry, School of chemistry and chemical engineering, Shandong University, Jinan

250100, P. R. China

Electronic Supplementary Material (ESI) for Catalysis Science & Technology.This journal is © The Royal Society of Chemistry 2019

Page 2: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S2

Table of Contents

I. Calculated Gibbs free energy profile for formation of acetylene silver intermediate……S3

II. Anti- vs. syn-fashion nucleophilic addition modes in π-activation mechanism…………S4

III. Other possible pathways in π-activation mechanism…………………………………...S7

IV. References…………………………………………………………..……….………….S10

V. Thermodynamic data…………………………………………………………………..S11

VI. Cartesian coordinates of the structures………………………………………………….S14

Page 3: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S3

I. Calculated Gibbs free energy profile for formation of acetylene silver intermediate

0.0

17

2.8

TS8

22.2 8

19.1

R1

AgPhen

Ar

HOTs

PhenAgOTs

H

Ar Ag

OTs

Phen

H

ArAgPhen

OTs

deprotonation2.812

3.1752.234

2.022

2.1611.430

1.172

22.2

Ar = (p-F)C6H4

Gsolkcal mol-1

Fig. S1. Calculated Gibbs free energy profile for formation of acetylene silver intermediate 8

from the reaction of terminal alkyne (R1) with PhenAgOTs. The key bond distances are

given in Å.

Page 4: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S4

II. Anti- vs. syn-fashion nucleophilic addition modes in π-activation mechanism

The discussion on anti- vs. syn-fashion mechanisms shown in Fig. 3.

According to the activation strain model,1–3 each of two transition states was divided into

three fragments, A, B, and C, as shown in Table S1. The calculated interaction energies (Eint)

show that the electronic interaction in TS11' (syn-fashion) is much stronger than that in TS11

(anti-fashion mechanism). This is supported by the stronger dipole interaction in TS11' in

comparison with TS11, as indicated by the calculated NBO charges at the Cβ and Cγ atoms

(0.147 and -1.180 e in TS11' vs 0.214 and -0.462 e in TS11, Fig. S2a). On the other hand,

however, the distortion energy ΔEdist in TS11' (28.8 kcal mol-1) is much larger than that in

TS11 (14.6 kcal mol-1), making TS11' relatively less stable than TS11. Further, it is noted

that fragment B (substrate R2) is mainly responsible for the much larger distortion energy,

27.6 kcal mol-1 in TS11' vs. 12.8 kcal mol-1 in TS11. This is attributed to the larger change of

Cβ–Cα–I angle from 169.0° (Fig. S2b) in R2 to 109.5° in TS11' than to 126.3° in TS11 (Fig.

S2a).

Page 5: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S5

Table S1. Distortion-Interaction Analysis for TS11 and TS11' Involved in Pathway IIIa

ICF3

O

CF3

PhB

CF3O

F3C

I

Ph

AgPhen

Ar

AuLTS11

AuLC

AgPhenArA

transition states ΔE⧧b ΔEdist−Ac ΔEdist−B

c ΔEdist−Cc ΔEdist

d ΔEinte

TS11 -27.4 1.3 12.8 0.5 14.6 -42.0

TS11' -23.3 0.4 27.6 0.8 28.8 -52.1

aAll energies are given in kcal mol-1, bthe activation energy ΔE⧧, cthe distortion energy of the

fragment A, B, or C, dthe total distortion energy, ΔEdist (ΔEdist−A + ΔEdist−B + ΔEdist−C), and

ethe interaction energy ΔEint (ΔE⧧ − ΔEdist).

In addition, from an orbital interaction point of view, Fig. S2c shows the difference

between anti- and syn-fashion nucleophilic attack in TS11 and TS11'. In TS11, gold(I)

interacts with the nascent π-bond, facilitating the Cγ atom attacking to Cβ atom at side

opposite to gold catalyst. On the contrary, Cγ atom attacking to Cβ atom is blocked due to the

interaction between π-bond of alkyne and gold(I) center in TS11', going against the attack at

side to gold catalyst. Thus we can understand the higher stability of TS11, i.e., the anti-

fashion nucleophilic addition is favorable to generate cross-coupling product P1.

Page 6: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S6

CF3O

F3C

I

CαCβ

Ph

CγCδ

AgPhen

Ar

AuL

TS11

-0.462

0.214

ICF3

O

CF3

CαCβ

Ph

CγCδ

AgPhenAr AuL

TS11'

-1.180

0.147 -0.705

-0.214

-0.158

-0.731

109.5°126.3°

ICF3

O

CF3

CαCβPh

169.0°

R2

(a)

(b)CF3

O

F3C

I

Ph

AgPhen

Ar

AuL

Ph

AgPhenAr

AuL

TS11 TS11'

(c)

ICF3

O

CF3

+

CF3

OCF3

I

CαCβ

LAu

Ph

-0.154AgPhenAr

F3C OF3C

I

CαCβ

Ph

AuL

-0.073AgPhenAr

-0.167-0.367

-0.463Cγ

-0.313-0.234

-0.476Cγ

TS13

TS14

CF3O

F3C

I

CαCβ

Ph

CγCδ

AuL

Ar

AgPhen

TS15

-0.454

0.101

ICF3

O

CF3

CαCβ

Ph

CγCδ

AuLAr AgPhen

TS15'

-0.407

0.063 -0.713

0.042

-0.016

-0.721

CαCβ

LAu

Ph

AgPhen

Ar

ICF3

O

CF3

TS13'

-0.204-0.367

-0.137

F3C OF3C

I

CαCβ

Ph AuL

Cγ Cδ Ar

PhenAg

TS14'

-0.016-0.487

-0.455-0.133

-0.469

Fig. S2. (a) NBO charges (in e) on several vital transition states and key bond angles (Cβ–Cα–I) on TS11 and TS11', (b) key bond angle (Cβ–Cα–

I) on substrate R2, and (c)schematic orbital interaction in TS11 and TS11'.

Page 7: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S7

III. Other possible pathways in π-activation mechanism

Fig. S3 describes the generation of P1 according to pathway III via anti-fashion

nucleophilic addition (black line) or syn-fashion nucleophilic addition (red line) of acetylene

gold 14 to silver-activated alkynyl hypervalent iodine (6). The initial nucleophilic addition

steps via TS15 (anti-fashion) and TS15' (syn-fashion), which require energy barriers of 34.4

and 37.7 kcal mol-1, respectively. This results imply that pathway III via the reaction of

acetylene gold (14) with silver(I)-activated alkynyl hypervalent iodine (6) is unfavorable. It is

found that the Au–Cα bond distances in TS11 (2.094 Å) and in TS11' (2.049 Å) (Fig. 3) are

calculated to be shorter than Ag–Cα in TS15 (2.164 Å) and in TS15' (2.131 Å) (Fig. S3). This

observation is also supported by the NBO charges for much stronger electrostatic interaction

between Cβ and Cγ atoms in TS11 and TS11' than that in TS15 and TS15' (0.214 and -0.462

e vs 0.101 and -0.454 e for TS11 vs TS15, 0.147 and -1.180 e vs. 0.063 and -0.407 e for

TS11' vs. TS15') (Fig. S2a). Therefore, the details of this pathway will be not discussed

below.

Page 8: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S8

0.0

14

21

22

23

24P1

TS15

TS15'

TS16

TS17

16.0

34.4

37.7

11.4

30.2 29.7

25.924.4

-24.4

-43.8

LAuNT2

AuL

Ar

2.200

CF3O

CF3

I

Ph

AuL

Ar

AgPhen

I

CF3O

CF3

Ph

AuL

Ar AgPhen

I

CF3O

CF3

Ph

AuL

Ar

AgPhen

I

CF3

O

CF3

Ph

AuL

Ar

AgPhen

I

CF3O

CF3

Ph

AuL

Ar

AgPhen

I

CF3O

CF3

Ph

LAuAr

AgPhen

6

6+Au-[O]R2

34.437.7

anti-nucleophilic addition α-elimination 1,2-Ph migration

2.164

2.178

1.285

2.163

2.0801.292

2.258

2.131

2.194

2.132

2.1742.317

3.285

2.998

2.070

2.542

2.920

2.553

2.118

2.094

2.188

I

CF3O

CF3

Ph

LAuAr

AgPhen

2.188

1.644 1.761

2.099

I

CF3O

CF3

Ar Ph

LAu AgPhen

2.024

2.022

L = Me3P

[O] =I

CF3O

CF3

Ar = (p-F)C6H4

6

ayn-nucleophilic addition

αβγ

δδ

γ

αβ

β α

δγ

γ

γ

δ

δ

α

α

β

β

β

α

γ

δαβ

γδ

Gsolkcal mol-1

Fig. S3. Anti- vs. syn-fashion mechanisms for formation of the unsymmetrical diyne (P1) according to pathway III shown in Scheme 3 via the

reaction of acetylene gold intermediate 14 with the silver(I)-activated alkynyl hypervalent iodine (6). The key bond distances are given in Å.

Page 9: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S9

Let us turn our attentions to the pathways IV (nucleophilic addition of gold acetylide on Cα

atom by AgI-activated alkyne) and V (nucleophilic addition of gold acetylide on Cα atom by

IIII-activated alkyne), the relative energies of transition states TS18 and TS18' (pathway IV,

Fig. S4), and TS19and TS19' (pathway V, Fig. S5) are calculated to be more than 35.0 kcal

mol-1. These results suggest that pathways IV and V are unfavorable and should be ruled out.

0.0

LAuNTf2

14

TS18

16.0

38.9

CF3

OCF3

IPhenAg

Ph

δ

γ

2.018

AuLAr

TS18'

PhenAg

Ph

δ

γ

2.024 AuL

Ar

ICF3

O

CF3

38.9

anti-nucleophilic additionsyn-nucleophilic addition

6

6

47.8

47.8

AuL

Ar

2.2291.283 2.162

2.233

2.170

2.2081.283

2.186

2.1662.175

β

β

α

α

L = Me3P

Ar = (p-F)C6H4

Gsolkcal mol-1

Fig. S4. Calculated Gibbs free energies for stationary points of the nucleophilic addition of

acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along

pathway IV shown in Scheme 3. The key bond distances are given in Å.

Page 10: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S10

0.0

LAuNTf2

14

TS19

16.0

39.5

δ γ

TS19'

δ γ

39.5

anti-nucleophilic additionsyn-nucleophilic addition

6

6

50.0

50.0

AuL

Ar

β

β

α

α

L = Me3P

Ar = (p-F)C6H4F3C O

F3C

I

Ph

AgPhen

2.011 AuLAr

2.3001.305

2.306

2.098

2.179

F3C O

F3C

I

Ph AgPhen

Ar

LAu

2.2571.305

2.674

2.079

2.182

2.010

Gsolkcal mol-1

Fig. S5. Calculated Gibbs free energy profiles for the nucleophilic addition step according to

pathway V in Scheme 3 via the reaction of acetylene gold intermediate 14 with the silver(I)-

activated alkynyl hypervalent iodine (6). The key bond distances are given in Å.

IV. References

1. W.-J. van Zeist and F. M. Bickelhaupt, Org. Biomol. Chem., 2010, 8, 3118–3127.

2. I. Fernández and F. M. Bickelhaupt, Chem. Soc. Rev., 2014, 43, 4953–4967.

3. L. P. Wolters and F. M. Bickelhaupt, WIREs Comput. Mol. Sci., 2015, 5, 324–343.

Page 11: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S11

V. Thermodynamic Data

Table S2. Calculated Zero-Point Correction (ZPE) Corrections, thermal corrections to

enthalpies (TCH), thermal corrections to Gibbs free energies (TCG), enthalpies (H), and

Gibbs free energies (G), electronic energies (E) in CH3CN and the Imaginary Frequencies (IF,

cm-1) of the transition states. All energies are given in Hartree.

Page 12: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S12

StructureZPE(1)

TCH(2)

TCG(3)

E(4)

H(5)=(2)+(4)

G(6)=(3)+(4)

IF

R1 0.101347 0.109548 0.069633 -407.4679612 -407.3584132 -407.39833

R2 0.220976 0.244193 0.16475 -1338.396561 -1338.152368 -1338.2318

NTf2− 0.053497 0.06886 0.010102 -1827.224727 -1827.155867 -1827.2146

Me3PAuNTf2

0.170267 0.195884 0.111713 -2423.605942 -2423.410058 -2423.4942

PhenAuNTf2 0.227695 0.256054 0.164937 -2533.885641 -2533.629587 -2533.7207

Me3P 0.113026 0.120665 0.083733 -461.0188265 -460.8981615 -460.93509

Phen 0.170808 0.180909 0.136138 -571.3235379 -571.1426289 -571.1874

AgOTs 0.13178 0.144805 0.08994 -1040.415083 -1040.270278 -1040.3251

OTs− 0.130578 0.141642 0.092897 -894.7565262 -894.6148842 -894.66363

PhenAgOTs 0.304537 0.32876 0.245332 -1611.780603 -1611.451843 -1611.5353

HNTf2 0.065474 0.081453 0.020581 -1827.640042 -1827.558589 -1827.6195

HOTs 0.14211 0.154029 0.103611 -895.1887483 -895.0347193 -895.08514

H-[O] 0.132269 0.148491 0.087848 -1031.42608 -1031.277589 -1031.3382

Ag-[O] 0.292445 0.321702 0.227563 -1747.992092 -1747.67039 -1747.7645

Au-[O] 0.236219 0.262193 0.177651 -1627.356734 -1627.094541 -1627.1791

1 0.21808 0.236369 0.168795 -1003.834945 -1003.598576 -1003.6662

2 0.337651 0.371289 0.266172 -1934.772217 -1934.400928 -1934.506

3 0.337319 0.370968 0.265356 -1934.764176 -1934.393208 -1934.4988

4 0.275205 0.296469 0.2208 -1124.48392 -1124.187451 -1124.2631

5 0.394584 0.431258 0.317196 -2055.414149 -2054.982891 -2055.097

6 0.394665 0.431121 0.318876 -2055.415364 -2054.984243 -2055.0965

TS1 0.336402 0.369543 0.266295 -1934.731521 -1934.361978 -1934.4652 -23.37

7 0.337523 0.370923 0.267745 -1934.742368 -1934.371445 -1934.4746

8 0.264077 0.285066 0.208639 -1124.026605 -1123.741539 -1123.818

9 0.60433 0.659276 0.50379 -3058.847739 -3058.188463 -3058.3439

10 0.748414 0.81543 0.631897 -3954.058009 -3953.242579 -3953.4261

TS2 0.746455 0.812648 0.632022 -3954.047473 -3953.234825 -3953.4155 -22.36

11 0.615215 0.665542 0.518044 -2922.62506 -2921.959518 -2922.107

12 0.576025 0.6227 0.48309 -2434.899692 -2434.276992 -2434.4166

TS3 0.574258 0.620732 0.481509 -2434.869763 -2434.249031 -2434.3883 -438.56

13 0.576586 0.623743 0.479843 -2434.97159 -2434.347847 -2434.4917

14 0.207532 0.225412 0.158145 -1003.405675 -1003.180263 -1003.2475

P1 0.194437 0.209093 0.150055 -714.5236752 -714.3145822 -714.37362

TS4 0.602182 0.657098 0.501776 -3058.823874 -3058.166776 -3058.3221 -435.31

TS5 0.613538 0.663659 0.516796 -2922.603358 -2921.939699 -2922.0866 -425.19

15 0.615831 0.666426 0.516751 -2922.690627 -2922.024201 -2922.1739

16 0.309218 0.334415 0.24931 -1310.794364 -1310.459949 -1310.5451

TS7 0.307848 0.332927 0.24781 -1310.769301 -1310.436374 -1310.5215 -171.51

17 0.406736 0.440286 0.332495 -2019.261596 -2018.82131 -2018.9291

TS8 0.402338 0.435234 0.329133 -2019.227317 -2018.792083 -2018.8982 -692.75

18 0.272417 0.307182 0.198819 -2831.078814 -2830.771632 -2830.88

Page 13: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S13

TS9 0.268091 0.302222 0.195599 -2831.053151 -2830.750929 -2830.8576 -800.73

TS10 0.427631 0.469381 0.346223 -2341.746586 -2341.277205 -2341.4004 -86.9

TS11 0.602059 0.656817 0.501012 -3058.80919 -3058.152373 -3058.3082 -54.17

19 0.60479 0.659363 0.503624 -3058.885938 -3058.226575 -3058.3823

TS12 0.601336 0.656837 0.493484 -3058.852585 -3058.195748 -3058.3591 -151.51

20 0.60353 0.659252 0.497491 -3058.898144 -3058.238892 -3058.4007

TS11' 0.601395 0.656427 0.497531 -3058.802656 -3058.146229 -3058.3051 -144.42

19' 0.60397 0.658717 0.502653 -3058.879384 -3058.220667 -3058.3767

TS12' 0.600146 0.65534 0.495647 -3058.81281 -3058.15747 -3058.3172 -176.21

TS13 0.601832 0.656658 0.501859 -3058.801991 -3058.145333 -3058.3001 -144.65

TS13' 0.600998 0.655981 0.498133 -3058.784113 -3058.128132 -3058.286 -127.15

TS14 0.601743 0.656616 0.498789 -3058.798317 -3058.141701 -3058.2995 -61.81

TS14' 0.601682 0.65643 0.500356 -3058.785931 -3058.129501 -3058.2856 -49.51

TS15 0.602224 0.65682 0.501681 -3058.816434 -3058.159614 -3058.3148 -290.12

21 0.604258 0.658545 0.505118 -3058.856577 -3058.198032 -3058.3515

TS16 0.602081 0.656552 0.502917 -3058.824325 -3058.167773 -3058.3214 -30.71

22 0.602313 0.657534 0.502021 -3058.824353 -3058.166819 -3058.3223

23 0.603035 0.657843 0.503116 -3058.831494 -3058.173651 -3058.3284

TS17 0.602145 0.656479 0.502236 -3058.832939 -3058.17646 -3058.3307 -200.6

24 0.603525 0.659013 0.501731 -3058.910167 -3058.251154 -3058.4084

TS15' 0.601644 0.656475 0.498631 -3058.807915 -3058.15144 -3058.3093 -278.8

TS18 0.602226 0.656881 0.501529 -3058.808742 -3058.151861 -3058.3072 -260.34

TS18' 0.601788 0.656288 0.502857 -3058.795811 -3058.139523 -3058.293 -255.31

TS19 0.602045 0.656738 0.500412 -3058.806586 -3058.149848 -3058.3062 -152.03

TS19' 0.602261 0.6566 0.503632 -3058.7931 -3058.1365 -3058.2895 -49.8

TS3' 0.57433 0.620785 0.482003 -2434.869955 -2434.24917 -2434.388 -439.52

13' 0.576617 0.623761 0.481444 -2434.972311 -2434.34855 -2434.4909

P2 0.186289 0.20176 0.140809 -813.7650436 -813.5632836 -813.62423

14' 0.215716 0.232757 0.167637 -904.1640828 -903.9313258 -903.99645

Page 14: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S14

VI. Cartesian Coordinates of the Structures

R1 C -1.19522500 0.62548800 0.00002400 C 0.19632400 0.62971500 0.00066000 C 0.91248900 1.84247700 0.00022300 C 0.19628500 3.05521700 -0.00086100 C -1.19526300 3.05939800 -0.00149000 C -1.86932200 1.84243100 -0.00103900 H -1.76091000 -0.29987100 0.00034800 H 0.74180300 -0.30805100 0.00149800 H 0.74173500 3.99300000 -0.00120000 H -1.76098100 3.98473600 -0.00232500 C 2.34151400 1.84250300 0.00087800 C 3.55169600 1.84247000 0.00142600 H 4.61694600 1.84163300 0.00158400 F -3.21662700 1.84241100 -0.00164700

R2 C -2.84555400 1.64656800 1.39434600 C -1.95251900 1.31911500 0.37476100 C -0.79420100 2.08375000 0.17127200 C -0.59110000 3.15864300 1.02371700 C -1.45462100 3.51374000 2.04810800 C -2.60146900 2.73778100 2.22952200 H -3.73707800 1.04344000 1.53578600 H -2.14877400 0.47139400 -0.26802200 H -1.23988500 4.36645500 2.68333000 H -3.29791100 2.99068800 3.02312200 C 0.25578200 1.80358800 -0.92470800 C 0.88978400 0.40139300 -0.68814300 C -0.41788900 1.87808600 -2.32587200 O 1.27018600 2.72618300 -0.90767100 I 1.20932400 4.25726500 0.62822100 C 0.82954300 5.57554400 2.21181900 C 0.81135000 6.44033000 3.07293700 C 0.76829600 7.44133600 4.09107900 C 1.40977200 7.22848800 5.32727200 C 0.08606900 8.65429100 3.87158700 C 1.36673300 8.20714000 6.31661400 H 1.93619100 6.29480700 5.49663800 C 0.04777900 9.62671000 4.86729200 H -0.40713200 8.81944500 2.91918600 C 0.68674000 9.40665400 6.09029800

Page 15: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S15

H 1.86440000 8.03433400 7.26623300 H -0.48087700 10.55844200 4.68925400 H 0.65522200 10.16767000 6.86444900 F 1.83735100 0.13175900 -1.59563400 F 1.46028300 0.37186800 0.53196000 F -0.01626400 -0.60463500 -0.73741400 F -1.00283300 3.08176400 -2.47844600 F -1.37594200 0.93530900 -2.50008900 F 0.47763900 1.72478500 -3.30945500

NTf2−

S -0.81916600 -0.06289500 1.36341800 S -0.92584200 0.38371200 -1.46725100 O -1.68289600 0.55316000 2.37852300 O -0.90677800 -1.51304600 1.14295200 O -1.00016800 1.57660700 -2.31793100 O -1.89385900 -0.70080000 -1.66981900 C 0.90110000 0.19549500 2.04222400 C 0.71665600 -0.37392100 -1.94796900 F 1.12978200 1.48344700 2.33358200 F 1.04639800 -0.52015400 3.17325600 F 1.83539600 -0.21351400 1.16942700 F 1.72078700 0.49794600 -1.76370600 F 0.98224200 -1.47820000 -1.23817800 F 0.69264000 -0.70990600 -3.25165400 N -0.72634800 0.88208300 0.05312300

Me3PAuNTf2

P 1.96742400 0.32681800 0.05722200 Au 0.16164300 -0.95036200 -0.48774700 C 2.30884800 0.35571000 1.86104700 H 1.43585300 0.74955700 2.38717300 H 2.48628600 -0.66391700 2.21146400 H 3.18137800 0.97739800 2.08394700 C 1.78672100 2.08880100 -0.42737100 H 0.90681500 2.50981900 0.06500900 H 2.67404100 2.66378500 -0.14522000 H 1.63657800 2.15401900 -1.50771800 C 3.53966900 -0.22195600 -0.71750200 H 4.36709600 0.43092800 -0.42309700 H 3.75723700 -1.24707600 -0.40799200 H 3.43304400 -0.20653700 -1.80486500 S -2.06486200 -3.18650800 0.17581200 S -2.42109800 -1.63539600 -2.32092400

Page 16: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S16

O -1.04896000 -3.12943100 1.22970900 O -3.48146800 -3.03788000 0.47597400 O -2.23918200 -0.19247300 -2.47537400 O -3.73402600 -2.26265900 -2.37893300 C -1.85986400 -4.87945300 -0.60044200 C -1.42003800 -2.38265800 -3.71811400 F -0.61020400 -5.02332100 -1.05111200 F -2.09629700 -5.79601300 0.33955800 F -2.71582100 -5.04296000 -1.60625500 F -0.18566800 -1.85921200 -3.73375700 F -1.32736200 -3.70616600 -3.58042100 F -2.02713800 -2.09890200 -4.87066000 N -1.51230500 -2.13118800 -1.00447800

PhenAuNTf2

Au -1.10125600 -0.66311900 0.00123000 S 1.87614300 -1.48850700 -0.89109100 S 1.29094200 1.39623500 -0.68302500 O 1.06796600 -2.69880600 -0.74846400 O 2.64315800 -1.22482800 -2.10009900 O 0.15886500 2.11819900 -1.26542300 O 2.64210500 1.55523300 -1.20304800 C 3.10694300 -1.58242100 0.51980500 C 1.35259200 1.99334800 1.09371100 F 2.45484300 -1.66081000 1.68357600 F 3.83904100 -2.68616100 0.35248700 F 3.90665400 -0.51864900 0.53166000 F 0.14178200 1.91514200 1.66032000 F 2.21458700 1.26775900 1.80717900 F 1.74673200 3.26910500 1.08936800 N 0.86515100 -0.20802200 -0.45965500 C -3.01182600 -2.72498600 0.88168200 C -4.15895500 -0.71462900 0.55623100 C -5.36177700 -2.68711500 1.32602400 H -2.06169600 -3.24372300 0.83534200 H -6.28603000 -3.16679900 1.63548100 C -4.17802100 3.32262300 -0.61250000 C -5.36904200 2.75788300 -0.20564600 C -5.40040000 1.40238000 0.19506900 C -4.17338300 0.68446400 0.15945400 H -4.12381400 4.35909600 -0.92853100 H -6.28781700 3.33791100 -0.19039100 C -5.37974500 -1.32517700 0.95979700 C -6.59316400 -0.55906000 0.98448400

Page 17: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S17

H -7.50540200 -1.05547200 1.30173100 C -6.60442400 0.75124500 0.61921200 H -7.52745300 1.32380300 0.63944400 C -4.17677600 -3.39084700 1.28290400 H -4.12436000 -4.43965600 1.55181600 C -3.01512700 2.52372200 -0.61431500 H -2.05258100 2.91743600 -0.93068200 N -2.99583500 -1.43173100 0.53439600 N -3.02114200 1.25498600 -0.23922100

Me3P P -3.35638400 -1.38903300 1.38578800 C -3.71805100 -2.84618100 0.27693400 H -4.26955400 -2.50597800 -0.60496900 H -2.77721600 -3.28481100 -0.06960100 H -4.30452900 -3.62346000 0.78068100 C -5.08322100 -1.04860400 2.00669400 H -5.68910100 -0.63549400 1.19438000 H -5.57689000 -1.94869500 2.39129300 H -5.04472800 -0.30061400 2.80458700 C -2.67685900 -2.29775000 2.86774000 H -3.33035300 -3.11359900 3.19789300 H -1.69359500 -2.71169800 2.62396400 H -2.54423800 -1.59644100 3.69733600

Phen C -4.66873700 -1.64008300 0.00509300 C -2.60258200 -0.63977100 -0.00487400 C -4.59222800 0.75282500 -0.01773500 H -5.24017400 -2.56779100 0.01409300 H -5.06408600 1.73224600 -0.02700400 C 1.59487700 -0.98899000 -0.00218900 C 1.04627500 0.27600600 -0.01436100 C -0.35883500 0.42382200 -0.01563700 C -1.14885200 -0.76268200 -0.00415900 H 2.66963800 -1.14103300 -0.00087000 H 1.67580100 1.16235800 -0.02299000 C -3.18222900 0.66268700 -0.01728800 C -2.34472500 1.82780700 -0.02875300 H -2.81823300 2.80616200 -0.03808700 C -0.98872400 1.71313300 -0.02791900 H -0.35748500 2.59800000 -0.03655400 C -5.34539700 -0.40213800 -0.00647000 H -6.43043000 -0.37152200 -0.00634900

Page 18: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S18

C 0.71996400 -2.09580400 0.00869800 H 1.12748400 -3.10630000 0.01829900 N -3.35216600 -1.76585500 0.00599600 N -0.59903500 -1.99876700 0.00781100

AgOTs Ag -0.64402500 7.19215000 -1.75442500 C 1.39944400 9.26518200 -6.69875900 C 1.22689100 8.87830300 -5.37126700 C 1.23240500 9.85082300 -4.37057300 C 1.41553800 11.19760600 -4.68641700 C 1.58412400 11.56768900 -6.01932700 C 1.57855600 10.61201000 -7.04503800 H 1.39942800 8.50815500 -7.47902000 H 1.11032400 7.83339900 -5.10619400 H 1.43612900 11.93693900 -3.89330500 H 1.72553200 12.61670100 -6.26661200 C 1.79641600 11.01822100 -8.48310100 H 2.86472600 11.02113500 -8.73350700 H 1.30280000 10.32793100 -9.17351700 H 1.41497400 12.02505000 -8.67693400 S 0.95203200 9.39604900 -2.65915700 O -0.56654600 9.37499100 -2.47037900 O 1.41939700 7.94929200 -2.53317800 O 1.65477400 10.36981600 -1.81853300

OTs−

C -0.70221200 0.53761200 -2.10887100 C 0.38270900 0.70348300 -1.24826900 C 0.85271600 1.98353500 -0.94363200 C 0.22806600 3.09151600 -1.51890400 C -0.85723800 2.92058200 -2.37997500 C -1.34122300 1.64265600 -2.68953200 H -1.05943700 -0.46574100 -2.33874700 H 0.89066500 -0.15118700 -0.81250700 H 0.61699600 4.07884300 -1.29054000 H -1.33618600 3.79291500 -2.82343600 C -2.49403700 1.45691100 -3.65079100 H -3.12746400 2.34963800 -3.69382800 H -2.14482400 1.25971900 -4.67401600 H -3.12775100 0.61057400 -3.36180000 S 2.22359400 2.20555700 0.23723300 O 2.85183700 3.48701500 -0.18452600 O 1.54833800 2.26089200 1.56150100

Page 19: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S19

O 3.06824500 0.99773600 0.03138000

PhenAgOTs C -4.31551700 -1.89125900 -0.14361800 C -2.42581300 -0.55438100 -0.17022700 C -4.61120600 0.47514700 -0.37872600 H -4.72315400 -2.89544800 -0.07024400 H -5.23625800 1.35670800 -0.49227300 C 1.76081100 -0.24850000 0.02311500 C 1.02995000 0.91285400 -0.12149300 C -0.38119800 0.84957000 -0.19145400 C -0.97867000 -0.43500300 -0.10539300 H 2.84387300 -0.22946500 0.08011800 H 1.52284900 1.87953300 -0.18265000 C -3.20792100 0.62328600 -0.31987400 C -2.56430200 1.90348900 -0.40416300 H -3.18573800 2.78708500 -0.51796100 C -1.20819400 2.01207800 -0.34231100 H -0.72906400 2.98502200 -0.40620900 C -5.16975400 -0.78345800 -0.29066000 H -6.24329700 -0.93203100 -0.33161900 C 1.07954800 -1.48141000 0.09788200 H 1.59813200 -2.43205000 0.20804400 N -2.99248100 -1.78540700 -0.08547300 N -0.24367500 -1.55873200 0.03539400 Ag -1.49149500 -3.60817900 0.19779200 C 1.50509700 -9.62655500 -0.08388900 C 1.14591900 -8.46658800 0.60159500 C 1.10801700 -7.25062100 -0.08045200 C 1.43406000 -7.18968700 -1.43616300 C 1.79134800 -8.35682400 -2.10858600 C 1.83308400 -9.59198600 -1.44591800 H 1.53413900 -10.57421000 0.44873700 H 0.90629200 -8.48995600 1.65915500 H 1.42031800 -6.23278300 -1.94669100 H 2.04639900 -8.30873400 -3.16478600 C 2.25520400 -10.84655500 -2.17417600 H 1.96565800 -10.81439400 -3.22916200 H 3.34445000 -10.97687700 -2.14069400 H 1.80797800 -11.73927300 -1.72660300 S 0.60741400 -5.76156600 0.79311600 O 1.31451200 -4.62851200 0.13032700 O -0.90061200 -5.67761900 0.50996000 O 0.90091100 -5.97541400 2.22011700

Page 20: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S20

HNTf2

H 3.25361900 5.29502800 0.32113500 S 4.60620400 5.16441200 2.19994200 S 4.00082300 7.45534500 0.22177900 O 4.88358200 3.81237000 1.74261600 O 5.60408300 6.08286300 2.71090200 O 3.23407800 7.37399300 -1.01267900 O 5.40091500 7.82263900 0.28116200 C 3.25399200 5.01668600 3.48938000 C 3.08060100 8.59279100 1.39364400 F 2.23467600 4.33205000 2.97057200 F 3.75148000 4.36855900 4.53659700 F 2.84258800 6.22712300 3.85588400 F 1.81484900 8.19870000 1.49579100 F 3.66347600 8.56496900 2.58750700 F 3.13609200 9.81939800 0.88551400 N 3.70773800 5.93840900 0.96819300

HOTs H 2.54183700 -3.18352700 -2.11073100 C 5.59203900 -4.04214100 1.93861900 C 4.49147300 -4.18021500 1.09679300 C 4.66349500 -4.80075000 -0.14173200 C 5.90789300 -5.28879400 -0.54250400 C 6.99694000 -5.13643500 0.31266100 C 6.85956400 -4.50933100 1.55958700 H 5.46407000 -3.56974400 2.90885200 H 3.50877800 -3.83350100 1.39708900 H 6.01198100 -5.79078800 -1.49804700 H 7.96833000 -5.51768200 0.00994100 C 8.05056800 -4.32485600 2.46822200 H 8.82258600 -5.07472500 2.27505500 H 8.50661400 -3.33849400 2.31746900 H 7.76412400 -4.39202500 3.52187200 S 3.26343200 -4.98469500 -1.22665200 O 3.40543100 -3.62802100 -2.15370800 O 3.48772400 -6.13321800 -2.09366800 O 2.02190700 -4.82771300 -0.46603200

H-[O] C 3.35360900 0.49028900 2.67718000 C 3.68422600 1.41289400 1.69163400 C 3.45497100 1.17005500 0.32443200

Page 21: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S21

C 2.91095700 -0.08243700 -0.03059400 C 2.56956000 -1.00555000 0.96807600 C 2.78121600 -0.72507700 2.31420000 H 3.54348000 0.72689800 3.71924400 H 4.12926200 2.35116900 1.99363000 H 2.14039000 -1.95788000 0.68015100 H 2.50682500 -1.45923900 3.06568100 C 3.87224600 2.26553800 -0.66719400 C 3.57495600 3.70933400 -0.13336800 C 5.38788800 2.12331000 -0.99789800 O 3.13824600 2.14381700 -1.85294800 I 2.56855800 -0.84347600 -1.99630300 F 3.64990100 4.58313100 -1.16316400 F 2.33850400 3.78324400 0.37259300 F 4.44101600 4.14510600 0.80491800 F 5.64306500 0.91421800 -1.51183600 F 6.16829600 2.29331200 0.08120700 F 5.74836800 3.04553900 -1.92267700 H 3.45648600 2.81277200 -2.47681000

Ag-[O] C 1.62360800 -0.31705700 -4.69592900 C 1.72321200 0.74006700 -3.79705400 C 1.29962700 0.63854200 -2.45852400 C 0.79837900 -0.60831900 -2.04528700 C 0.70061100 -1.67772100 -2.94560400 C 1.10300900 -1.53594200 -4.27022000 H 1.95550100 -0.18345500 -5.72141500 H 2.13809800 1.67561700 -4.14643300 H 0.30884400 -2.62786100 -2.59997100 H 1.01366400 -2.37527800 -4.95403200 C 1.42928100 1.86981600 -1.50395900 C 2.92900700 1.94646100 -1.05207600 C 1.07620300 3.19643000 -2.27626500 O 0.60418000 1.75853600 -0.44700700 I 0.16898600 -1.14129000 -0.06976800 F 3.16793800 3.05931200 -0.29620400 F 3.23857700 0.88671100 -0.28950000 F 3.81388900 1.98782600 -2.07189900 F -0.09716500 3.07788200 -2.91610200 F 2.00014500 3.60418600 -3.18954900 F 0.95154100 4.24052800 -1.41397100 C 2.38250700 5.91772400 1.14813700 C 1.22970400 5.61688600 3.12784800

Page 22: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S22

C 2.59546100 7.59586500 2.85095800 H 2.61309700 5.51974900 0.16452500 H 2.99491500 8.53331800 3.22843500 C -1.37230500 3.24921500 5.43794100 C -0.90643400 4.42994000 5.97864300 C -0.03138600 5.24500100 5.22722100 C 0.33199000 4.80005800 3.92733100 H -2.04520600 2.60004600 5.98746800 H -1.20282600 4.74299700 6.97603900 C 1.72421200 6.83566300 3.66400300 C 1.33297200 7.24690200 4.98165800 H 1.72390100 8.18282300 5.37081100 C 0.49022300 6.48385300 5.73100600 H 0.19698100 6.79997100 6.72801200 C 2.92685700 7.13956400 1.59148100 H 3.59285200 7.70034500 0.94447300 C -0.95692500 2.88960500 4.14298100 H -1.30360700 1.96645000 3.68788200 N 1.56523400 5.18660700 1.89261100 N -0.13520700 3.63507600 3.41138800 Ag 0.56457000 3.01515400 1.25497000

Au-[O] C -1.59016500 -4.97674600 -2.15369100 C -0.54375800 -4.14847000 -1.76325700 C -0.28922600 -3.83251900 -0.41526400 C -1.17510600 -4.36488500 0.54078700 C -2.23107900 -5.19957900 0.14917900 C -2.43877400 -5.51380900 -1.19005900 H -1.73686500 -5.19572700 -3.20706600 H 0.09898700 -3.73708900 -2.52896300 H -2.89636500 -5.60070000 0.90500100 H -3.26101500 -6.16611100 -1.46957900 C 0.90847800 -2.90055400 -0.06768700 C 2.13399600 -3.18547300 -1.01116500 C 0.43918500 -1.42408700 -0.29297200 O 1.31408600 -3.11652000 1.21512800 I -1.16381200 -4.00797600 2.64971800 F 3.25241000 -2.59143800 -0.54254000 F 2.38283700 -4.50306400 -1.08154400 F 1.98058200 -2.72764800 -2.28228900 F -0.47896400 -1.08480800 0.62704700 F -0.10387000 -1.21993500 -1.50987900 F 1.46898100 -0.54649400 -0.17336300

Page 23: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S23

P 3.82010700 -0.76020300 3.79575200 Au 2.51523900 -1.94803000 2.37733400 C 2.92740600 0.55917000 4.71374200 H 2.47411900 1.24991700 3.99856500 H 2.12726000 0.10840400 5.30602100 H 3.60492900 1.10943400 5.37416100 C 5.20700200 0.11683900 2.96692500 H 4.80443600 0.80339200 2.21819500 H 5.80607700 0.67674700 3.69174200 H 5.84073800 -0.61201300 2.45578100 C 4.63214500 -1.76490200 5.10446600 H 5.25430600 -1.13906800 5.75183700 H 3.86746100 -2.26295100 5.70561600 H 5.25260000 -2.53281100 4.63590400

1 P 1.66185300 1.10255300 0.83459000 Au 1.30711600 1.22808400 -1.48130300 C 0.38600300 1.98190500 1.81697300 H 0.36307400 3.03596600 1.53019500 H -0.59595300 1.54530800 1.61962600 H 0.60841800 1.90260200 2.88541300 C 3.26762600 1.84061900 1.32540200 H 3.29482600 2.89189300 1.02875100 H 3.40562600 1.76722400 2.40830100 H 4.08277400 1.31565900 0.82154700 C 1.68582500 -0.61765200 1.47197300 H 1.87338100 -0.62028200 2.54996400 H 0.72522400 -1.09800000 1.27131300 H 2.47111900 -1.18543200 0.96719400 C -2.85472900 -0.89485000 -5.16426800 C -1.57944900 -0.56851800 -4.74120200 C -1.26103000 0.77500100 -4.40338700 C -2.25856000 1.78253900 -4.50579200 C -3.53405800 1.45681100 -4.92861000 C -3.81068200 0.12338600 -5.25041200 H -3.13002200 -1.90867800 -5.43144200 H -0.81264600 -1.33203400 -4.66703500 H -2.00828400 2.80711700 -4.25270200 H -4.31717200 2.20079100 -5.01952100 C 0.03626100 1.11067800 -4.01329300 C 1.18581900 1.40247900 -3.60134600 H 2.10360900 1.71592800 -4.08225000 F -5.03567700 -0.18980900 -5.65569900

Page 24: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S24

2 C -3.97990500 4.34290800 4.39066400 C -3.17566600 4.44841100 3.25746000 C -2.55010700 5.66130100 2.92213000 C -2.77670900 6.72814900 3.78727200 C -3.56732600 6.66083300 4.92373000 C -4.17873300 5.44210600 5.22407500 H -4.45075200 3.39277900 4.62033200 H -3.03158700 3.58333500 2.62486000 H -3.70520900 7.52856800 5.56005400 H -4.80444800 5.36231500 6.10707200 C -1.64341500 5.81017400 1.68511500 C -0.36687700 4.93519800 1.88479000 C -2.42478900 5.38924600 0.40179000 O -1.26044700 7.13993400 1.54477200 I -1.82356500 8.60833200 3.32640000 C -2.49471500 9.58176000 4.95648500 C -2.77842500 10.35890600 5.85433800 C -3.12864800 11.23469900 6.91923800 C -2.30137600 11.33032700 8.05739900 C -4.30303000 12.01148000 6.84045500 C -2.64857200 12.18879900 9.09525800 H -1.39876700 10.73086600 8.11379500 C -4.63921900 12.86560200 7.88554300 H -4.93645900 11.93474900 5.96289600 C -3.81480000 12.95525800 9.01118200 H -2.01143700 12.26145800 9.97086400 H -5.54379300 13.46218900 7.82440300 H -4.08175600 13.62341300 9.82420800 F 0.45910400 5.02117700 0.81887500 F 0.30497200 5.38101300 2.95888300 F -0.64842500 3.63682600 2.06843200 F -3.55953900 6.09650500 0.31467800 F -2.73327200 4.08029600 0.39033800 F -1.70174800 5.63403900 -0.71190000 P 1.45386400 8.82951600 -1.48123200 Au 0.06221600 7.90582900 0.06454700 C 3.22324200 8.72512800 -1.01230800 H 3.38854100 9.26465500 -0.07674800 H 3.50050300 7.67876900 -0.86362500 H 3.85079500 9.15859700 -1.79688800 C 1.12406200 10.60450800 -1.80181800 H 1.24804100 11.17513200 -0.87832100

Page 25: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S25

H 1.81425600 10.98841400 -2.55909900 H 0.09691500 10.72830700 -2.15317500 C 1.31907500 7.99657700 -3.10891600 H 2.00945800 8.44953400 -3.82681100 H 1.55544700 6.93559100 -2.99838300 H 0.29640900 8.08684300 -3.48296400

3 P -0.41365200 0.88046700 -4.85194500 Au -0.73361900 0.15532000 -2.64189900 C 1.34804200 1.18751600 -5.26781200 H 1.75703200 1.94664900 -4.59663600 H 1.92165500 0.26624500 -5.13996300 H 1.44299400 1.53115200 -6.30219100 C -1.28322700 2.45438400 -5.22215900 H -0.92530800 3.23818900 -4.55004400 H -1.10432300 2.75785900 -6.25797700 H -2.35690200 2.32688500 -5.06402900 C -1.00796000 -0.31255300 -6.11508500 H -0.83576500 0.07914400 -7.12206800 H -0.47793600 -1.26131400 -6.00160400 H -2.07661400 -0.49307400 -5.97627800 C -3.26926200 -5.24925000 -2.46412700 C -2.02126000 -5.76031400 -2.10715100 C -1.07779400 -4.94292400 -1.47151800 C -1.43719300 -3.61826900 -1.24527700 C -2.66516100 -3.07384300 -1.58699700 C -3.59345900 -3.91712000 -2.20599800 H -3.99217900 -5.89951500 -2.94567100 H -1.77715500 -6.79484200 -2.31219700 H -2.90154100 -2.03770300 -1.37880400 H -4.56885300 -3.52623700 -2.47788200 C 0.32603800 -5.39018000 -1.05396500 C 0.27501100 -6.70829700 -0.22610000 C 1.21940400 -5.54912000 -2.31870600 O 0.92674200 -4.45253000 -0.20842900 I 0.13778200 -2.51917100 -0.30859000 C -1.00675200 -0.42508000 -0.69613600 C -1.44095000 -0.11164700 0.43560900 C -1.90433000 0.23770700 1.71704200 C -3.21663700 -0.10832500 2.12367700 C -1.05674100 0.94403400 2.60642000 C -3.66226100 0.24530300 3.38941200 H -3.86221200 -0.64781400 1.43878600

Page 26: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S26

C -1.51738600 1.29246800 3.86853400 H -0.05439300 1.20985800 2.28746000 C -2.81569400 0.94360400 4.25946500 H -4.66643800 -0.01879600 3.70411300 H -0.87104500 1.83455500 4.55080000 H -3.17064900 1.21793600 5.24817700 F 1.46928300 -6.99695800 0.29188500 F -0.60637500 -6.57311500 0.77690900 F -0.11402100 -7.75276600 -0.98924000 F 1.30883100 -4.34763600 -2.93678700 F 0.69974800 -6.42239800 -3.19977800 F 2.45357100 -5.94681400 -2.00493100

4 C -0.12699900 -3.84741400 6.91661500 C 1.11218900 -3.82247800 7.54186900 C 2.28418600 -3.58916100 6.78914400 C 2.18977200 -3.38364000 5.39505500 C 0.95201000 -3.40745900 4.76703800 C -0.18696800 -3.63850300 5.53867600 H -1.04093900 -4.03018100 7.47033200 H 1.18554500 -3.99090100 8.61111200 H 3.09101300 -3.21517400 4.81503400 H 0.85262300 -3.25830300 3.69782800 C 3.55791900 -3.60680300 7.42490900 C 4.66511100 -3.66282500 7.96961800 H 5.54518600 -4.16957300 8.31482800 F -1.37856100 -3.65926400 4.93626200 C 2.54534500 1.05912000 7.80706600 C 4.54113700 1.64632500 8.83474700 C 2.89480500 3.36332900 8.35641800 H 1.93214200 0.26683100 7.38814400 H 2.57527400 4.40111000 8.38181000 C 8.28373000 0.50648500 10.39336400 C 7.92718600 1.83806400 10.44709600 C 6.67739600 2.25044000 9.93175600 C 5.83229700 1.25482900 9.37222300 H 9.23466400 0.15757500 10.78008800 H 8.59471000 2.57667600 10.88136200 C 4.15777700 3.01364800 8.88505700 C 5.04189600 3.98681900 9.45864600 H 4.72352100 5.02446600 9.48316100 C 6.25226100 3.62024600 9.96116500 H 6.91848900 4.35992100 10.39451200

Page 27: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S27

C 2.08420500 2.38630900 7.81619700 H 1.10976700 2.62184000 7.40329900 C 7.38287700 -0.40853600 9.82108700 H 7.63455600 -1.46361600 9.76434900 N 3.72887000 0.69894500 8.29685000 N 6.20128700 -0.05133700 9.32798300 Ag 4.58688500 -1.45301700 8.32810500

5 C -4.06748000 4.35225700 4.61745100 C -3.17881300 4.38146800 3.54387300 C -2.47613600 5.55426600 3.22283200 C -2.72264900 6.66326200 4.02384100 C -3.59946900 6.67363200 5.09689500 C -4.28020100 5.49087400 5.39365200 H -4.59574800 3.43220700 4.84509800 H -3.02602500 3.48981100 2.95076400 H -3.75058800 7.57264200 5.68498000 H -4.97189700 5.46881300 6.22959600 C -1.48719000 5.64923000 2.04393900 C -0.37034200 4.57355300 2.20945800 C -2.26710500 5.44794100 0.70868900 O -0.88407000 6.89144600 2.01209700 I -1.65876000 8.46752700 3.52186500 C -2.51894500 9.58439300 4.98278400 C -2.89922100 10.43195000 5.77460200 C -3.36618500 11.39608800 6.71310300 C -2.71816200 11.54757600 7.95592100 C -4.47832700 12.20520600 6.40335200 C -3.17930900 12.49125900 8.86832700 H -1.86248400 10.92318800 8.19106600 C -4.92970300 13.14582200 7.32377900 H -4.97478400 12.08603400 5.44594700 C -4.28292200 13.28983000 8.55461700 H -2.67924100 12.60526900 9.82491600 H -5.78639600 13.76733000 7.08311100 H -4.63924700 14.02477900 9.26992500 F 0.58460400 4.71516200 1.25864700 F 0.22489000 4.72093400 3.40136300 F -0.83246200 3.31432400 2.11509900 F -3.18401500 6.41930900 0.57884300 F -2.89085700 4.26253900 0.62797800 F -1.43356800 5.53155600 -0.36010700 C -0.06091100 7.40339200 -2.78458000

Page 28: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S28

C 2.00884500 8.30914500 -2.27225200 C 1.29974900 8.20079800 -4.58850400 H -0.96915100 6.93963400 -2.41176300 H 1.48164800 8.38294800 -5.64382600 C 4.89857300 9.32576200 0.62224600 C 5.17723500 9.58103800 -0.70454500 C 4.22579100 9.25317200 -1.69618100 C 3.00259400 8.66570100 -1.27262900 H 5.60821800 9.56234700 1.40717600 H 6.12123000 10.03021900 -0.99955900 C 2.28561900 8.56291000 -3.64257300 C 3.53108000 9.16298700 -4.02532600 H 3.71585100 9.34588400 -5.07959400 C 4.46320700 9.49348900 -3.09055600 H 5.40607900 9.94479000 -3.38424700 C 0.12356400 7.61936000 -4.16239700 H -0.65068300 7.32730300 -4.86316400 C 3.66147900 8.74454400 0.94918800 H 3.41209300 8.52990400 1.98425100 N 0.84601600 7.73794900 -1.87345000 N 2.74478300 8.42697600 0.03945300 Ag 0.66766100 7.44210400 0.48988000

6 C -0.70699100 6.49006300 -2.16102200 C -0.58815500 5.27809300 -1.48095300 C -0.27964600 5.25947800 -0.11361700 C -0.07322000 6.48499300 0.50687900 C -0.19304700 7.70889100 -0.13445200 C -0.51636300 7.70110900 -1.49432300 H -0.95981300 6.48614900 -3.21633000 H -0.74824000 4.34360400 -2.00286500 H -0.05906200 8.64026900 0.40358400 H -0.62909500 8.64311200 -2.02173000 C -0.14005900 3.98483300 0.73557500 C -1.38031700 3.06158700 0.54786400 C 1.16871000 3.24133200 0.33718100 O -0.07922300 4.28203000 2.08605700 I 0.41171600 6.28472400 2.58009000 C 0.86547200 8.42731100 2.72345500 C 0.71538300 9.46408200 3.39517200 C 0.46375300 10.63633000 4.16631000 C 1.23736900 10.91941000 5.31227600 C -0.59005200 11.50184400 3.80297100

Page 29: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S29

C 0.95603400 12.04711200 6.07604300 H 2.04224000 10.24801100 5.59416500 C -0.86004800 12.62668700 4.57537400 H -1.18800800 11.27800400 2.92562700 C -0.08951900 12.90070100 5.70941300 H 1.54790000 12.26018100 6.96044900 H -1.67367300 13.28864700 4.29683200 H -0.30580500 13.77859400 6.31029400 F -1.35558800 2.04264600 1.40818200 F -2.50162500 3.76983900 0.75539300 F -1.43629700 2.54684100 -0.70313600 F 2.23240600 4.04253300 0.62733500 F 1.23155800 2.96484600 -0.97897100 F 1.32540100 2.10435200 1.01446600 C 4.57747500 11.86752200 1.56768400 C 5.39148000 10.06496300 0.35335200 C 6.63138100 12.15057500 0.36964200 H 3.79660300 12.25475200 2.21548200 H 7.48405700 12.74686600 0.05788900 C 4.96981500 6.07529300 -0.92372400 C 6.07512600 6.78501800 -1.34409300 C 6.24286200 8.12766000 -0.93384200 C 5.24818300 8.68911000 -0.08922300 H 4.80782900 5.04367500 -1.21540800 H 6.82119400 6.32714400 -1.98721300 C 6.52070000 10.81392000 -0.07475600 C 7.50158600 10.20871700 -0.92895100 H 8.35486700 10.80371400 -1.23984300 C 7.36857900 8.91831100 -1.34058000 H 8.11439200 8.46408800 -1.98584400 C 5.65915700 12.68180200 1.19195800 H 5.71485300 13.70374800 1.54978100 C 4.03374000 6.71518800 -0.09168600 H 3.15410900 6.18002500 0.24827000 N 4.44502900 10.60586500 1.16569100 N 4.16724100 7.97392600 0.31340300 Ag 2.71780500 9.18359200 1.75493600

TS1 C -4.87440600 4.31657400 3.43791700 C -3.57726800 4.30812700 2.92621100 C -2.80472500 5.48039600 2.95825500 C -3.37910800 6.60430600 3.50592000 C -4.66705300 6.65422300 4.02377200

Page 30: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S30

C -5.42199000 5.47844100 3.98451100 H -5.46196600 3.40488800 3.40774700 H -3.16772300 3.39960000 2.50553300 H -5.08822600 7.56237400 4.44730400 H -6.43244300 5.47876100 4.38077100 C -1.36028300 5.57668300 2.42173000 C -0.44635000 4.59928100 3.21914500 C -1.35136900 5.26549900 0.89541100 O -0.89467900 6.86649100 2.60989900 I -2.27781500 8.48688300 3.62192700 C -0.43972500 9.39313300 3.11745200 C -0.00538700 10.54485500 3.24269400 C 0.58498400 11.82888100 3.33530000 C 0.40274900 12.77029200 2.29654600 C 1.34413700 12.18364300 4.47393000 C 0.96922200 14.03550800 2.40126300 H -0.18566900 12.49666300 1.42679100 C 1.90560900 13.45236600 4.56407900 H 1.47596200 11.46106400 5.27274900 C 1.71957900 14.37762100 3.53133500 H 0.82467400 14.75878300 1.60511000 H 2.48505300 13.72483400 5.44037500 H 2.15751500 15.36798000 3.60873900 F 0.84067500 4.70477100 2.82771300 F -0.50335400 4.90189100 4.52442000 F -0.81050400 3.31596900 3.06036700 F -2.14557500 6.13836500 0.25837000 F -1.77848400 4.02137500 0.62422200 F -0.10968800 5.38700700 0.38062400 P 3.20140300 8.10190600 1.34340400 Au 1.05645800 7.70684400 2.07947000 C 3.25327300 8.99232000 -0.26017200 H 2.73494100 8.40377700 -1.02093400 H 2.74515900 9.95442600 -0.16053000 H 4.28819000 9.15986100 -0.57353100 C 4.18219500 6.57172500 1.09116100 H 3.68965800 5.94221000 0.34634500 H 5.19348800 6.81564500 0.75120400 H 4.23886000 6.01600800 2.03011800 C 4.18356900 9.12585400 2.50726600 H 5.18731800 9.30244300 2.10899200 H 3.68176000 10.08336200 2.66639000 H 4.26183000 8.61063000 3.46775900

Page 31: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S31

7 C -3.65424500 -4.45566700 1.36481600 C -2.69942300 -3.48732100 1.65665900 C -2.27363600 -2.54188500 0.70451800 C -2.88167800 -2.58435600 -0.56671400 C -3.84062500 -3.56271100 -0.85877500 C -4.22419800 -4.49986000 0.09663100 H -3.94764400 -5.16562500 2.13107900 H -2.27910900 -3.46799900 2.65230900 H -4.29675900 -3.58387700 -1.84152300 H -4.96973100 -5.24772900 -0.15418500 C -1.22386400 -1.48875900 1.14415000 C -1.95242100 -0.39785200 1.98882500 C -0.06728800 -2.15002400 1.97488800 O -0.63313000 -0.91215200 0.03277100 I -2.58069900 -1.23983400 -2.20469300 C 1.32663600 2.55744400 0.25366700 C 1.99990600 3.58597000 0.25909100 C 2.70413000 4.81360300 0.31502400 C 2.49974100 5.79941400 -0.67859800 C 3.61633700 5.06556600 1.36634600 C 3.19887000 6.99831600 -0.62167000 H 1.78901800 5.61038700 -1.47639900 C 4.30902700 6.26861900 1.41161500 H 3.76183800 4.31402300 2.13535900 C 4.10322000 7.23505400 0.42013500 H 3.03847200 7.75376100 -1.38411100 H 5.00694000 6.45993900 2.22035700 H 4.64426100 8.17528800 0.46218500 F -1.07206000 0.62228800 2.30160100 F -2.93360700 0.15972000 1.27841000 F -2.44266600 -0.84989400 3.14211500 F 0.44673600 -3.18989700 1.29199200 F -0.40258400 -2.56901400 3.20072600 F 0.95783700 -1.26287900 2.14994200 P 2.13328100 -0.18705300 -1.08786400 Au 0.44174200 0.81965400 0.16729600 C 1.57355200 -1.79763700 -1.71161100 H 1.29857400 -2.44248600 -0.87711000 H 0.69599500 -1.66469100 -2.34819400 H 2.39854000 -2.23497900 -2.28668200 C 3.54371200 -0.41559600 0.03822200 H 3.21152300 -0.98972100 0.90613500 H 4.33615300 -0.96202400 -0.48490500

Page 32: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S32

H 3.91251000 0.55835400 0.36579800 C 2.60082500 0.87222800 -2.49220800 H 3.37545200 0.36191600 -3.07548600 H 1.72700200 1.04400700 -3.12522500 H 2.97090100 1.82924100 -2.12192600

8 C 1.31605000 -6.62209700 4.04141500 C 2.08041900 -6.02055700 5.03809400 C 3.02744400 -5.01922300 4.73248000 C 3.17647700 -4.64355100 3.37996400 C 2.41636200 -5.23823000 2.37577600 C 1.49605300 -6.22087000 2.72251800 H 0.58727600 -7.39233900 4.27185400 H 1.95311700 -6.32096400 6.07298100 H 3.89952900 -3.87477400 3.12757500 H 2.52721100 -4.95215300 1.33492000 C 3.80872100 -4.40825400 5.75835300 C 4.47815900 -3.88452400 6.64469500 F 0.75480400 -6.80270300 1.74945800 C 5.22960300 -1.42972000 10.83766000 C 7.48665900 -1.71444900 10.41469700 C 6.79426200 -0.52232800 12.40994700 H 4.21060200 -1.60889400 10.50799900 H 7.03364200 0.01540800 13.32333100 C 10.51226900 -3.23782000 7.93111900 C 10.88868500 -2.56365300 9.07476200 C 9.89693100 -2.03769500 9.93326900 C 8.53987100 -2.23709400 9.56165400 H 11.24890500 -3.65365800 7.25189600 H 11.93750400 -2.43080300 9.32624600 C 7.84106900 -1.01694900 11.60140400 C 9.22453300 -0.83724400 11.93924000 H 9.46735600 -0.29969300 12.85140600 C 10.21138000 -1.32663100 11.13908100 H 11.25621500 -1.18660300 11.40178400 C 5.48419800 -0.72823800 12.02975800 H 4.65589200 -0.36232100 12.62656000 C 9.13795500 -3.38139600 7.65275100 H 8.80286900 -3.90630100 6.76140300 N 6.19241500 -1.90741500 10.05474200 N 8.18723400 -2.89894200 8.43836300 Ag 5.62174700 -3.03700700 8.10945400

Page 33: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S33

9 C -0.86390000 -6.29318900 0.65953000 C -0.19175500 -5.17632200 1.14515400 C -0.23270800 -3.92885100 0.49496700 C -1.02289600 -3.84497300 -0.66818300 C -1.70710600 -4.96485400 -1.15623700 C -1.62378300 -6.19082200 -0.50150200 H -0.79283400 -7.23499100 1.19404800 H 0.38033900 -5.27926000 2.05687600 H -2.30958300 -4.87652100 -2.05293100 H -2.15618800 -7.04955300 -0.89833000 C 0.54530200 -2.72308800 1.09703600 C -0.35420000 -2.10072700 2.22344800 C 1.88445300 -3.18659000 1.77762000 O 0.83123200 -1.85502900 0.07980300 I -1.38497500 -2.10543900 -1.87688300 C 2.98950200 1.54372100 -0.37013200 C 3.64374900 2.55971000 -0.52079900 C 4.42347400 3.74686500 -0.69180800 C 4.58127300 4.32506900 -1.96640900 C 5.04696300 4.35401000 0.41574700 C 5.34343600 5.47971700 -2.12530400 H 4.09950000 3.86374600 -2.82309500 C 5.80906500 5.50718700 0.24686300 H 4.92622800 3.91314900 1.40008900 C 5.95999700 6.07344200 -1.02133800 H 5.45741200 5.91721200 -3.11266400 H 6.28627000 5.96590100 1.10763200 H 6.55485900 6.97274200 -1.14860100 F 0.29756600 -1.16364900 2.94019600 F -1.44561500 -1.51288700 1.67562100 F -0.80328900 -3.02449300 3.08977100 F 2.58393700 -4.00100700 0.95486600 F 1.72634200 -3.82957500 2.94941300 F 2.68157600 -2.12134400 2.03112500 P 3.58109900 -1.29752100 -1.36584900 Au 1.93019000 -0.08237700 -0.07036000 C 2.93205000 -2.84496800 -2.09361700 H 2.53769900 -3.48594100 -1.30760800 H 2.12234700 -2.60431400 -2.78611000 H 3.73353800 -3.35899800 -2.63305600 C 5.03471900 -1.73613200 -0.34354700 H 4.71579000 -2.36059800 0.49220400 H 5.77208000 -2.27547900 -0.94559300

Page 34: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S34

H 5.48372200 -0.81990200 0.04766800 C 4.22748400 -0.33239600 -2.78194900 H 5.00107200 -0.90652200 -3.30031700 H 3.41206600 -0.11770300 -3.47728800 H 4.63728400 0.61210700 -2.42175500 C -1.16817900 4.83052400 3.56587600 C -0.62372500 4.02787100 2.57013100 C -0.51118200 2.63466500 2.75596900 C -0.95332700 2.06255600 3.96784000 C -1.49545000 2.86044500 4.96816900 C -1.59622900 4.23271800 4.74924800 H -1.26160400 5.90396400 3.44500300 H -0.27529600 4.47134600 1.64335200 H -0.85488100 0.99211300 4.11218800 H -1.83518400 2.44228700 5.90915200 C 0.06645600 1.80451800 1.75008400 C 0.59443100 1.04364500 0.93697900 F -2.12240400 5.00505700 5.71127600 C -4.41740900 -0.04803700 1.04844600 C -4.54882400 1.35687200 -0.78793300 C -6.58761900 0.67244400 0.33512500 H -3.77694200 -0.61498900 1.71722700 H -7.66980800 0.69255900 0.42779100 C -2.61231000 3.50679800 -3.84996500 C -3.98804500 3.57178000 -3.77041800 C -4.66484300 2.85911300 -2.75540500 C -3.88042300 2.09604300 -1.84720200 H -2.06257200 4.04320500 -4.61557200 H -4.56088700 4.16458600 -4.47792500 C -5.96670800 1.40779200 -0.69950600 C -6.71854700 2.18824000 -1.63953700 H -7.80023200 2.21022600 -1.54604400 C -6.09330400 2.88734100 -2.62542500 H -6.66605800 3.47860000 -3.33366000 C -5.81442000 -0.06055700 1.21116700 H -6.25953000 -0.63756400 2.01424400 C -1.92168300 2.72206700 -2.90899500 H -0.83771600 2.65039200 -2.94288200 N -3.80572400 0.63690700 0.08835900 N -2.52824700 2.03938000 -1.94450200 Ag -1.42680300 0.74954600 -0.18185200

10 C -6.12806600 -0.03573500 -2.42423400

Page 35: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S35

C -5.02959100 -0.39836200 -1.65241100 C -3.84765200 0.36944300 -1.58206500 C -3.85390700 1.57781900 -2.31344000 C -4.96167200 1.94537900 -3.09175200 C -6.09596200 1.14411200 -3.15840300 H -7.00387500 -0.67657400 -2.43789800 H -5.10817700 -1.31118200 -1.08320000 H -4.93319300 2.87708700 -3.64442400 H -6.94020000 1.45084600 -3.76795400 C -2.68221300 -0.13014800 -0.65995800 C -2.96580100 0.39903300 0.78693900 C -2.66494600 -1.70303000 -0.59784000 O -1.43900600 0.35018200 -1.05679500 I -2.32255700 3.06399000 -2.39063000 C 2.10990600 -1.49590200 -1.85073200 C 3.17489800 -2.03296000 -2.10151400 C 4.42579900 -2.67375900 -2.37019000 C 4.97527800 -2.67599800 -3.66718800 C 5.12630600 -3.31954900 -1.33183400 C 6.19242700 -3.30551300 -3.91571000 H 4.44006300 -2.18563900 -4.47483100 C 6.34196100 -3.94817100 -1.58942300 H 4.70330800 -3.32621400 -0.33253900 C 6.87884400 -3.94283900 -2.87930700 H 6.60444100 -3.30304200 -4.92036800 H 6.87037000 -4.44670900 -0.78243700 H 7.82566900 -4.43608000 -3.07675900 F -2.09823000 -0.10935500 1.67809700 F -2.83739400 1.74033800 0.79960700 F -4.20798500 0.10420500 1.20671800 F -2.66566100 -2.22272700 -1.85538900 F -3.69873200 -2.24335200 0.07003600 F -1.55712000 -2.17041700 0.00581800 P -0.10942700 -0.93579400 -3.78484600 Au 0.37548300 -0.68141600 -1.42049000 C 0.00065900 -2.70620800 -4.23901200 H 0.98106400 -3.09238300 -3.95427900 H -0.76869100 -3.26022600 -3.69554300 H -0.15417500 -2.83346300 -5.31448400 C 1.13498300 -0.04627300 -4.79373200 H 2.13374300 -0.36877500 -4.49512900 H 0.97893100 -0.24994800 -5.85719100 H 1.03864900 1.02788400 -4.61505700 C -1.72982000 -0.35813400 -4.39610900

Page 36: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S36

H -1.80783200 -0.58644000 -5.46374800 H -2.53314200 -0.85491500 -3.85304600 H -1.81327900 0.71901800 -4.24353200 C 0.31311400 -0.60806400 5.39703200 C 0.34063800 -0.31101100 4.03743800 C 1.00881900 -1.16759400 3.13825200 C 1.64364900 -2.32666800 3.62840300 C 1.61431200 -2.62831400 4.98582000 C 0.94939800 -1.76108700 5.84934000 H -0.19803600 0.03410400 6.10590900 H -0.14689300 0.57952500 3.65717900 H 2.15258100 -2.98967000 2.93641000 H 2.09047500 -3.51842900 5.38175000 C 1.02373500 -0.87380900 1.73383500 C 0.92634500 -0.65903900 0.52401200 H -0.57544300 1.83034600 -0.25494400 F 0.92387800 -2.04648800 7.16174200 C 5.21748700 1.04077900 -1.33457400 C 6.00007600 1.46634000 0.80341300 C 7.44253400 1.89687600 -1.09859500 H 4.39678400 0.67947200 -1.94722700 H 8.39043100 2.23047600 -1.51155900 C 5.34672400 1.44700800 4.96185200 C 6.56588100 1.88961600 4.49240300 C 6.81607700 1.90554400 3.10166000 C 5.77861900 1.45757700 2.24013300 H 5.12239000 1.42393100 6.02260300 H 7.33884600 2.22746400 5.17697600 C 7.25392300 1.91005500 0.30146700 C 8.27515500 2.35125400 1.20753200 H 9.22223500 2.68732700 0.79585200 C 8.06408600 2.35116800 2.55198200 H 8.83941500 2.68786900 3.23382600 C 6.42561500 1.45867800 -1.92105900 H 6.54183600 1.43030200 -2.99887000 C 4.38175800 1.01724900 4.03194300 H 3.41111800 0.66191800 4.36692100 N 5.00868100 1.04846800 -0.02335500 N 4.58961900 1.01985900 2.72084800 Ag 2.96662300 0.47246400 1.04083100 C -1.56581300 6.48287900 1.18491800 C -1.20987500 5.14746300 1.35159300 C 0.09163200 4.75358800 1.03029400 C 1.03276500 5.66793600 0.55418200

Page 37: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S37

C 0.65448700 6.99931500 0.39652700 C -0.64434300 7.42824400 0.70803100 H -2.57580700 6.79767300 1.43205700 H -1.92230100 4.42153900 1.72758400 H 2.04111200 5.34188400 0.32481400 H 1.38083700 7.71872400 0.02885500 C -1.03663100 8.87784300 0.56320400 H -2.07367900 8.97976000 0.23057400 H -0.95129900 9.40078500 1.52355300 H -0.39420200 9.39862300 -0.15169300 S 0.54376800 3.04397700 1.22249700 O 0.23763100 2.39927900 -0.23340700 O 2.00487400 2.95954900 1.36283500 O -0.32725800 2.42481400 2.22070800

TS2 C -6.39618300 -0.60541300 -1.96019500 C -5.19463300 -0.83802900 -1.30138600 C -4.14109600 0.10144100 -1.26057600 C -4.39318700 1.33861000 -1.89892500 C -5.60415700 1.56825500 -2.56947500 C -6.60467100 0.60495400 -2.61062700 H -7.16198600 -1.37413700 -1.95400200 H -5.09324000 -1.78688600 -0.80049800 H -5.76230600 2.52388400 -3.05484800 H -7.53309200 0.81003000 -3.13419400 C -2.85367200 -0.28481500 -0.46218700 C -2.99270200 0.20571600 1.01552400 C -2.65034700 -1.84469000 -0.45416900 O -1.65026400 0.23486000 -1.02388300 I -3.12080800 3.04100900 -1.95349600 C 2.16614400 -1.34061600 -1.94746700 C 3.22606000 -1.83747200 -2.27835800 C 4.46736700 -2.43565400 -2.66370400 C 5.09332000 -2.08045100 -3.87480600 C 5.07795100 -3.39453500 -1.83164400 C 6.30016300 -2.67134700 -4.24147000 H 4.62674400 -1.34282600 -4.52086900 C 6.28307600 -3.98189700 -2.20837700 H 4.59669600 -3.67147500 -0.89942000 C 6.89716900 -3.62329500 -3.41112200 H 6.77282700 -2.39312800 -5.17860400 H 6.74366400 -4.72313700 -1.56251600 H 7.83550400 -4.08574600 -3.70153600

Page 38: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S38

F -2.01812800 -0.28831200 1.79352600 F -2.92530700 1.54399000 1.05427900 F -4.17117000 -0.17488300 1.52999000 F -2.73588700 -2.32827100 -1.71486300 F -3.54188400 -2.48884000 0.31483800 F -1.44066400 -2.19347800 0.01026100 P -0.04627900 -0.39871600 -3.79090300 Au 0.44341300 -0.61096000 -1.42507900 C 0.44898300 -1.86703700 -4.76501800 H 1.49373000 -2.10715700 -4.56316100 H -0.16874000 -2.72053000 -4.47338500 H 0.30790600 -1.67061700 -5.83198900 C 0.90195000 1.03252400 -4.42419400 H 1.96947200 0.83752300 -4.29934600 H 0.67863200 1.20950500 -5.48033500 H 0.63711100 1.91418800 -3.83459400 C -1.79921900 -0.09790700 -4.20832700 H -1.91228700 -0.09114600 -5.29688900 H -2.42307600 -0.88276200 -3.77847200 H -2.11317700 0.86388600 -3.80028600 C 0.34427400 -0.42743000 5.31774400 C 0.42382000 -0.23043400 3.94219800 C 1.05783700 -1.19062400 3.12511200 C 1.60854100 -2.34640100 3.71077000 C 1.52894800 -2.54603200 5.08552700 C 0.89717100 -1.58209900 5.86682700 H -0.14429900 0.29219100 5.96573200 H 0.00498000 0.65776800 3.48048700 H 2.09302300 -3.08638100 3.08229500 H 1.94160700 -3.43109200 5.55684400 C 1.10319400 -0.98542700 1.70780300 C 1.00485700 -0.78498200 0.50000000 H -1.24355100 1.16445400 -0.69895300 F 0.82060800 -1.77156000 7.19488700 C 5.69792600 0.65215100 -0.91986600 C 6.17733600 1.17534900 1.28240100 C 7.95734700 1.22068300 -0.36640700 H 4.94389200 0.35387200 -1.64155400 H 8.99881800 1.38166100 -0.63069300 C 4.86873000 1.68005900 5.25288100 C 6.19991300 1.90065100 4.96842400 C 6.66806100 1.73739000 3.64540400 C 5.72614200 1.34838800 2.65407000 H 4.47663000 1.79626500 6.25731500

Page 39: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S39

H 6.89625400 2.19881700 5.74720800 C 7.54792900 1.39750900 0.97403800 C 8.46405500 1.78751900 2.00666700 H 9.50441100 1.95081200 1.74119800 C 8.04126800 1.95122200 3.28956700 H 8.73757400 2.24799800 4.06840400 C 7.03278200 0.84626900 -1.31865100 H 7.31399700 0.69597500 -2.35513700 C 4.01052600 1.29553500 4.20597200 H 2.95741900 1.10973000 4.39701100 N 5.28307800 0.80804600 0.33116700 N 4.42093600 1.13546200 2.95335300 Ag 2.99427200 0.60560200 1.07193300 C -1.32949700 6.36933400 0.76128600 C -1.00329700 5.02198100 0.90762000 C 0.13496200 4.52467400 0.27035200 C 0.94588900 5.35874600 -0.50137600 C 0.60473400 6.70307700 -0.63541900 C -0.53413800 7.23063800 -0.00841300 H -2.21343300 6.75961800 1.25858200 H -1.61303500 4.36248500 1.51537200 H 1.83744500 4.95947900 -0.97230000 H 1.23644200 7.35606100 -1.23207900 C -0.87500700 8.69598700 -0.13160200 H -1.94880300 8.86890400 -0.01805600 H -0.36650900 9.28175700 0.64404000 H -0.56380400 9.10015400 -1.09926800 S 0.53272500 2.78702300 0.43213000 O -0.16598100 2.10474500 -0.76088300 O 2.01099200 2.68204900 0.25478300 O -0.00434900 2.31935000 1.72254600

11 C -3.14155800 0.06370900 -0.63651900 C -4.20002500 0.40771200 -0.14498600 C -5.45078400 0.80894000 0.42092300 C -6.08816200 0.00940500 1.38952800 C -6.06271600 2.01093800 0.01531900 C -7.30602800 0.40588600 1.93632500 H -5.61865800 -0.91609100 1.70841300 C -7.28195900 2.39769200 0.56592300 H -5.57416600 2.63020500 -0.73014800 C -7.90683600 1.59859400 1.52650700 H -7.78821800 -0.21745500 2.68341400

Page 40: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S40

H -7.74570300 3.32551300 0.24484200 H -8.85724300 1.90371100 1.95361000 P -2.43292000 -2.37915500 -2.49556500 Au -1.42444700 -0.48314400 -1.39080600 C -4.25251200 -2.50086500 -2.37809600 H -4.54976100 -2.56822500 -1.32992400 H -4.70765800 -1.60341400 -2.80200800 H -4.60240400 -3.38371000 -2.92121900 C -1.75598400 -3.95109500 -1.84489700 H -1.99559100 -4.04309500 -0.78279800 H -2.18538200 -4.79844000 -2.38822900 H -0.67081600 -3.95141100 -1.96501000 C -2.01513300 -2.32052800 -4.27603800 H -2.35942600 -3.22962800 -4.77808700 H -2.49379500 -1.45176700 -4.73523000 H -0.93215700 -2.22440200 -4.37717700 C 1.43419800 5.61109000 -0.59937700 C 1.12203700 4.26890300 -0.77994600 C 0.04272600 3.68490900 -0.08402200 C -0.71720200 4.47861100 0.79983200 C -0.40927900 5.82145600 0.98478200 C 0.66304200 6.36585400 0.28175200 H 2.25689800 6.08034100 -1.12722400 H 1.70507300 3.65921000 -1.46210800 H -1.55103000 4.03353200 1.33236000 H -0.98279900 6.45015700 1.65666700 C -0.28970700 2.31323200 -0.29619500 C -0.58609800 1.14134500 -0.53619300 F 0.96316600 7.66120200 0.45920200 C 3.62704100 -3.60531600 -4.26669000 C 3.03202500 -2.52976600 -3.61450800 C 2.42391800 -2.74288600 -2.37373700 C 2.41716800 -4.00557700 -1.78015800 C 3.02274100 -5.06965100 -2.44965300 C 3.63395600 -4.89001100 -3.69799900 H 4.10113500 -3.44576100 -5.23136300 H 3.04846800 -1.53725800 -4.05214700 H 1.96439900 -4.14191000 -0.80411800 H 3.02752800 -6.05372000 -1.98908700 C 4.31300600 -6.03752800 -4.40425300 H 5.40059300 -5.98503500 -4.27394000 H 3.98135300 -7.00309100 -4.01401500 H 4.11639500 -6.01683700 -5.48046000 S 1.64938800 -1.36725200 -1.53994200

Page 41: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S41

O 0.32386200 -1.19296000 -2.36383800 O 1.31151400 -1.79543300 -0.15653700 O 2.51266700 -0.18361000 -1.67427600 C 4.28031400 0.66115900 1.09416200 C 3.38506000 0.68911900 3.23231500 C 5.78447300 0.88867200 2.94882500 H 4.08202600 0.57599000 0.02897700 H 6.78130400 0.99927900 3.36658100 C 0.00571800 0.45933500 5.73594500 C 1.24632800 0.61230900 6.31963300 C 2.39776400 0.69218400 5.50500100 C 2.21805900 0.61173000 4.09668800 H -0.89757400 0.39440400 6.33263400 H 1.35191300 0.67172800 7.39926200 C 4.67154800 0.83198100 3.81821700 C 4.80614800 0.91163100 5.24429100 H 5.80093700 1.02477000 5.66511000 C 3.71431700 0.84623300 6.05418900 H 3.82112600 0.90658800 7.13323300 C 5.59234300 0.79858700 1.58585400 H 6.42647500 0.83285900 0.89354400 C -0.07264500 0.38710900 4.33340600 H -1.03482900 0.26714600 3.84242500 N 3.21740700 0.61612500 1.88999300 N 0.98996000 0.45942500 3.54005000 Ag 0.97367600 0.45426400 1.10175900

12 C -2.10569700 -1.77310800 -0.60066600 C -2.93685900 -2.32669000 0.10031200 C -3.91129900 -2.96773000 0.92824300 C -4.12178000 -4.35808800 0.84492300 C -4.67662700 -2.21703400 1.84228200 C -5.07241500 -4.97658000 1.65285100 H -3.52964600 -4.94462400 0.14908000 C -5.62680900 -2.84335700 2.64486000 H -4.51536300 -1.14617300 1.91464700 C -5.82854600 -4.22267100 2.55356900 H -5.22335300 -6.04956400 1.58042600 H -6.21055800 -2.25350900 3.34524000 H -6.56958100 -4.70747400 3.18181200 P -2.16992300 -1.41227100 -3.59425100 Au -0.73977800 -0.86009400 -1.74456600 C -3.79292600 -0.58766800 -3.40932100

Page 42: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S42

H -4.22384600 -0.87546700 -2.44823900 H -3.65812000 0.49684000 -3.42686800 H -4.46244500 -0.88177300 -4.22306400 C -2.50495300 -3.20925000 -3.68056000 H -2.89805600 -3.53555700 -2.71599400 H -3.22881400 -3.42117700 -4.47301200 H -1.57629100 -3.74743300 -3.88642900 C -1.53452600 -0.93120200 -5.24233200 H -2.25553300 -1.21031700 -6.01643100 H -1.36330000 0.14664800 -5.27018200 H -0.58242000 -1.43175500 -5.42974200 C 2.12343100 1.74968800 3.96343400 C 1.69153100 1.46774300 2.67228600 C 1.28382400 0.16572500 2.31863200 C 1.31613100 -0.84977700 3.29610100 C 1.74803400 -0.57537000 4.58925900 C 2.14623600 0.72136000 4.90231700 H 2.43667400 2.74621200 4.25420500 H 1.65842200 2.25679000 1.92819200 H 0.99344600 -1.85142600 3.03279100 H 1.77664200 -1.34362200 5.35391200 C 0.81482900 -0.12580400 0.99969500 C 0.35351000 -0.41253000 -0.10301900 F 2.56549900 0.99009800 6.14885700 C 3.99940900 1.30283700 -6.30453200 C 3.18778000 0.63142200 -5.39557800 C 2.23175900 1.32916300 -4.62988500 C 2.10802500 2.72267900 -4.80483900 C 2.91426800 3.40106500 -5.71366600 C 3.84973600 2.67937300 -6.44965900 H 4.73813800 0.77945400 -6.90147800 H 3.28789400 -0.44209200 -5.27248600 H 1.36936400 3.26750400 -4.22582800 H 2.82654600 4.47169600 -5.86245400 C 1.38490400 0.63851700 -3.70580200 C 0.62436200 0.06238400 -2.93498300 F 4.63202300 3.33041600 -7.32613300 C 4.51758500 2.59494800 -1.31491100 C 5.67290700 0.59469400 -1.16269400 C 6.91027000 2.67813700 -1.29912800 H 3.55202200 3.09055400 -1.36118200 H 7.85134200 3.22001100 -1.32798400 C 5.62479000 -3.60740200 -0.86797800 C 6.84529800 -2.96506500 -0.89483600

Page 43: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S43

C 6.89249800 -1.55658400 -0.99609900 C 5.65680400 -0.85632200 -1.06536100 H 5.55342700 -4.68662200 -0.78866300 H 7.77336900 -3.52681900 -0.83813000 C 6.92428700 1.26904800 -1.19786500 C 8.14707100 0.52183000 -1.12962600 H 9.08725500 1.06452300 -1.15704600 C 8.13192200 -0.83510600 -1.03031600 H 9.05974900 -1.39674300 -0.97591900 C 5.70520800 3.34641600 -1.36019600 H 5.65914100 4.42695300 -1.43945400 C 4.45510500 -2.83014600 -0.94645100 H 3.47761500 -3.30471300 -0.92753500 N 4.49736600 1.27020000 -1.21656200 N 4.46630900 -1.50564200 -1.04411000 Ag 2.50754700 -0.06436000 -1.11767200

TS3 C 1.85324600 -1.92784000 -1.72407800 C 3.02082500 -2.13644900 -2.04196500 C 4.38198700 -2.36716000 -2.37501200 C 5.12979500 -1.38809400 -3.06436500 C 5.01061100 -3.58025400 -2.01938000 C 6.46374800 -1.62034200 -3.38471400 H 4.65269500 -0.45278700 -3.33982600 C 6.34513100 -3.80095600 -2.34541400 H 4.44241700 -4.33485900 -1.48488000 C 7.07626800 -2.82493500 -3.02813100 H 7.02902600 -0.85926900 -3.91437400 H 6.81807800 -4.73714600 -2.06440600 H 8.11736900 -3.00162900 -3.28022600 P -0.75416500 -2.78080100 -3.91003800 Au -0.14936700 -1.81734200 -1.72050400 C -1.41638900 -4.48538600 -3.73234900 H -0.66068500 -5.12290800 -3.26614800 H -2.29870500 -4.46574800 -3.08791500 H -1.68751600 -4.90305100 -4.70668800 C 0.66854700 -2.92493500 -5.05951200 H 1.49318200 -3.43049900 -4.55086700 H 0.39384100 -3.48068100 -5.96063600 H 1.00913000 -1.92514300 -5.34095300 C -2.04668400 -1.86272700 -4.83752500 H -2.31436400 -2.38536400 -5.76067300 H -2.93179300 -1.76020000 -4.20564000

Page 44: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S44

H -1.67884600 -0.86354100 -5.08495700 C 3.41110000 1.01575200 3.48055000 C 2.93032200 0.56919300 2.25413200 C 1.90237500 -0.39667300 2.18734700 C 1.37780800 -0.90981300 3.39339800 C 1.85824400 -0.47183000 4.62269800 C 2.86623200 0.48815900 4.64782600 H 4.20485800 1.75188100 3.54649300 H 3.35856200 0.95284700 1.33362500 H 0.59281000 -1.65761300 3.35370300 H 1.46693400 -0.86058500 5.55641300 C 1.41126000 -0.84641300 0.93062500 C 1.01820400 -1.23104600 -0.16598800 F 3.32851500 0.91775700 5.83478300 C -7.09269700 -1.81305700 -1.29683000 C -5.75900800 -1.49528500 -1.53612700 C -4.73833200 -1.99527200 -0.70202300 C -5.08968500 -2.82754300 0.38035600 C -6.42006200 -3.15412000 0.62283800 C -7.40230200 -2.64010400 -0.21965900 H -7.88916400 -1.44064000 -1.93165100 H -5.49875600 -0.85786300 -2.37536600 H -4.30989400 -3.21760900 1.02590400 H -6.70530800 -3.79670200 1.44841100 C -3.35703900 -1.68810800 -0.95625300 C -2.14474000 -1.57096300 -1.19579200 F -8.68677400 -2.94883400 0.01278600 C -5.40656400 2.05114400 0.58391900 C -3.49815400 3.32639400 0.89863100 C -5.66481500 4.27934800 1.42578800 H -5.82807200 1.10119200 0.26653300 H -6.27523100 5.10503400 1.78027600 C 0.69436600 3.65169600 0.72700900 C -0.02984100 4.73838000 1.16986500 C -1.43935600 4.65941600 1.23701900 C -2.05186600 3.44372300 0.83162200 H 1.77683600 3.67670000 0.67263700 H 0.46751700 5.65514000 1.47365100 C -4.26102200 4.43019200 1.36670200 C -3.60233900 5.64194800 1.76104500 H -4.20920000 6.47061600 2.11326400 C -2.24714100 5.75160600 1.69842500 H -1.75200800 6.66970500 2.00017200 C -6.24196700 3.08852900 1.03531900

Page 45: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S45

H -7.31566400 2.94079100 1.07068500 C 0.00391000 2.48681500 0.34513000 H 0.54196100 1.60662800 0.00590800 N -4.08408300 2.16377400 0.51686800 N -1.32101000 2.38794200 0.39089500 Ag -2.56490100 0.50052600 -0.24291000

13 C 1.28186300 1.74126200 1.41238300 C 0.77494800 2.66626400 0.79141000 C 0.17700300 3.76697100 0.11536900 C -0.00887600 3.74260600 -1.28363700 C -0.24082100 4.89948900 0.84644500 C -0.60167700 4.82649700 -1.92618000 H 0.31135600 2.87489200 -1.85161000 C -0.82990000 5.97651900 0.19098000 H -0.09854600 4.91969200 1.92201300 C -1.01272200 5.94393600 -1.19420800 H -0.74600900 4.79819500 -3.00220300 H -1.14845500 6.84335400 0.76178400 H -1.47485500 6.78577100 -1.70070700 P -1.32614700 -1.32655400 -0.30847700 Au 0.11738800 -0.40305800 -1.92102300 C -2.23782500 -0.04207000 0.63658300 H -1.52032800 0.61170700 1.13822900 H -2.83364600 0.56234100 -0.05206700 H -2.89825600 -0.50087900 1.37849500 C -0.51471100 -2.36306400 0.97340000 H 0.23154900 -1.76351000 1.50041000 H -1.25296300 -2.73664700 1.68939900 H -0.01436500 -3.21047500 0.49812500 C -2.63298700 -2.40274500 -1.02602200 H -3.29574200 -2.78402100 -0.24344300 H -3.22151500 -1.83166400 -1.74853000 H -2.17032800 -3.24463300 -1.54724100 C 4.13707100 -3.37221700 3.58524300 C 3.54220200 -2.35530400 2.84709000 C 2.98358400 -1.22994100 3.49065200 C 3.03883300 -1.15230300 4.89940200 C 3.63313600 -2.16580800 5.64230300 C 4.17333300 -3.26111200 4.97306800 H 4.57006000 -4.24429100 3.10777900 H 3.50435200 -2.42217000 1.76462800 H 2.61178800 -0.29083100 5.40149500

Page 46: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S46

H 3.68373500 -2.12160100 6.72456500 C 2.37536700 -0.18942700 2.73635200 C 1.85306600 0.71989500 2.10677200 F 4.74783800 -4.24167300 5.68737000 C 2.06102700 1.88797800 -8.00668200 C 1.80606200 1.17858100 -6.83906600 C 1.78178200 1.83398800 -5.58928800 C 2.02075800 3.22446200 -5.54182900 C 2.28069000 3.93924200 -6.70472700 C 2.29610800 3.25826300 -7.92016200 H 2.07944200 1.40247500 -8.97600800 H 1.61630100 0.11133000 -6.88256200 H 1.99940400 3.73505600 -4.58462000 H 2.46786500 5.00711700 -6.68784900 C 1.50173300 1.10607800 -4.39700300 C 1.23084600 0.47707100 -3.36633300 F 2.54552000 3.94533000 -9.04427800 C 4.76912900 1.65163600 0.04902100 C 6.07607300 0.05806300 -1.01362900 C 7.04849800 1.41125800 0.74910100 H 3.79566000 2.12450900 0.13582900 H 7.89326300 1.68674800 1.37410200 C 6.43435600 -2.97619000 -3.90978800 C 7.53995800 -2.66653700 -3.14481000 C 7.45091500 -1.65356600 -2.16336400 C 6.20273800 -0.99059500 -2.01189100 H 6.47002200 -3.74741400 -4.67135500 H 8.48092700 -3.19061400 -3.28640400 C 7.20302700 0.38856900 -0.21397700 C 8.44439500 -0.30648700 -0.39977800 H 9.28934700 -0.03145800 0.22438900 C 8.56415500 -1.28670800 -1.33642600 H 9.50645000 -1.80851600 -1.47422600 C 5.83071500 2.04418600 0.88400100 H 5.67741000 2.83044900 1.61468900 C 5.24100200 -2.26526800 -3.68622000 H 4.35195900 -2.48329300 -4.27195600 N 4.88613300 0.69579000 -0.86829500 N 5.12631200 -1.30858900 -2.77240300 Ag 3.17869200 0.09551300 -2.36208900

14 P 2.21567300 1.00059900 3.64763400 Au 0.31921300 0.82070100 2.27944900

Page 47: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S47

C 1.86031800 1.22821500 5.44101800 H 1.27015500 2.13747200 5.58009000 H 1.27039800 0.38206100 5.80212500 H 2.78433900 1.30195700 6.02309000 C 3.33462900 2.40667700 3.24143100 H 2.78171200 3.34545500 3.32722300 H 4.19974900 2.43180200 3.91142300 H 3.67809700 2.30791100 2.20865500 C 3.32634500 -0.46843800 3.60464400 H 4.19422200 -0.33144300 4.25750800 H 2.76808500 -1.35222100 3.92348200 H 3.66603500 -0.63349000 2.57910100 C -5.17969900 -0.97563300 -1.40642300 C -4.05843200 -0.84023100 -0.59251900 C -3.41854500 0.40710100 -0.43516700 C -3.94527100 1.51858600 -1.12585400 C -5.06611000 1.39292700 -1.94195600 C -5.66695800 0.14534600 -2.06960200 H -5.67759200 -1.93114600 -1.53297300 H -3.66343700 -1.70323200 -0.06679600 H -3.46264000 2.48379100 -1.01354000 H -5.47748800 2.24251500 -2.47660400 C -2.26998700 0.54012700 0.39978300 C -1.28350500 0.65217200 1.11699800 F -6.75562300 0.01855500 -2.86097700

P1 C 1.99952100 -3.15332500 -0.74547600 C 1.05132900 -3.62411700 -0.13603200 C -0.05202200 -4.17160600 0.57377200 C -1.11870400 -4.78127700 -0.11940100 C -0.09729400 -4.11329200 1.98252000 C -2.19650500 -5.31512300 0.58091600 H -1.08683900 -4.82776400 -1.20305500 C -1.18010500 -4.65048800 2.67244200 H 0.72165900 -3.64496600 2.51867200 C -2.23193800 -5.25221100 1.97647400 H -3.01206400 -5.78206400 0.03642300 H -1.20402000 -4.59974300 3.75710400 H -3.07490300 -5.67005400 2.51890000 C 6.23674500 -1.14711800 -4.84883200 C 5.15811800 -1.68010100 -4.15127800 C 5.10589100 -1.61270100 -2.74252100 C 6.16955000 -0.99338100 -2.05193600

Page 48: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S48

C 7.25076200 -0.45866800 -2.74416300 C 7.26691600 -0.54442700 -4.13310200 H 6.29110400 -1.19152300 -5.93106500 H 4.34438600 -2.15459500 -4.68919200 H 6.13658800 -0.93762200 -0.96912900 H 8.07539000 0.02007100 -2.22748700 C 4.00294000 -2.15900600 -2.03284300 C 3.05460500 -2.62958000 -1.42354100 F 8.31333500 -0.02759200 -4.80630400

TS4 C -2.54781100 -5.25962000 0.84328100 C -1.68440900 -4.26026200 1.28178200 C -1.54319300 -3.03501600 0.60459900 C -2.34984900 -2.84578800 -0.53294400 C -3.22690700 -3.84278200 -0.97459900 C -3.32217800 -5.05422100 -0.29414300 H -2.61241600 -6.19151200 1.39581800 H -1.10100800 -4.44067400 2.17395700 H -3.83763700 -3.67275300 -1.85392100 H -4.00134400 -5.82086200 -0.65386700 C -0.56005200 -1.95647000 1.14403700 C -1.30329600 -1.17584200 2.28115900 C 0.72409500 -2.60663800 1.77204900 O -0.16206700 -1.16225700 0.11324400 I -2.45067700 -1.09535500 -1.77955800 C 1.43430300 2.60217700 0.00962500 C 2.05224700 3.64517900 -0.18114900 C 2.75038200 4.86736000 -0.37330400 C 2.55950700 5.62860400 -1.54647200 C 3.64505500 5.34064400 0.61083300 C 3.24432300 6.82661800 -1.72449400 H 1.87368200 5.26874800 -2.30702700 C 4.32490200 6.53970700 0.42080300 H 3.79388400 4.76037900 1.51576300 C 4.12822900 7.28621300 -0.74423800 H 3.08990100 7.40445400 -2.63079800 H 5.01028400 6.89439700 1.18456800 H 4.66128200 8.22102100 -0.88764100 F -0.50913000 -0.25740800 2.87394000 F -2.36784400 -0.50720700 1.76674500 F -1.77664800 -1.97904000 3.24732700 F 1.28668900 -3.46897000 0.89944000 F 0.53152100 -3.26326300 2.93409800

Page 49: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S49

F 1.65065500 -1.65167100 2.03065800 P 2.63182000 -0.54071600 -1.23327600 Au 0.91524000 0.67905100 0.01182500 C 1.96958500 -1.97165200 -2.16544900 H 1.44081500 -2.62224300 -1.46805200 H 1.25585600 -1.61809600 -2.91334100 H 2.77681100 -2.51925200 -2.66077900 C 3.98397300 -1.20373400 -0.18450700 H 3.57027700 -1.91512200 0.53062900 H 4.73649700 -1.70126300 -0.80376000 H 4.45574100 -0.38593100 0.36639800 C 3.46932800 0.53351900 -2.46465700 H 4.28292300 -0.00261800 -2.96175500 H 2.74538900 0.86277600 -3.21442300 H 3.86924300 1.41801900 -1.96206700 C -2.81171300 5.48260700 3.42502000 C -2.13355600 4.78858300 2.43025900 C -1.60459200 3.50507500 2.68601500 C -1.77179900 2.93362000 3.96722000 C -2.44296400 3.62784900 4.96648400 C -2.95430300 4.89152100 4.67885800 H -3.22127700 6.47132000 3.25057600 H -1.99943600 5.23648100 1.45120200 H -1.37041300 1.94486600 4.16039500 H -2.57608400 3.20933300 5.95792400 C -0.88369200 2.78998000 1.68893200 C -0.17212700 2.17058100 0.88433400 F -3.60764100 5.56131000 5.63975800 C -5.19866700 1.29237900 1.42840900 C -5.43320800 2.45466700 -0.56168100 C -7.38828400 2.04543600 0.81631700 H -4.52653500 0.77630000 2.10723100 H -8.45488200 2.14212600 0.99832700 C -3.69871600 4.06736400 -4.04849500 C -5.05656200 4.21895400 -3.85816500 C -5.66470600 3.68831700 -2.69867800 C -4.83311100 3.00994100 -1.76496200 H -3.20125000 4.46329000 -4.92703600 H -5.66748300 4.74208100 -4.58839000 C -6.83255700 2.60128200 -0.35803500 C -7.63276400 3.29334500 -1.32678100 H -8.69867700 3.39064300 -1.14341700 C -7.07183300 3.81636900 -2.45063600 H -7.68076300 4.33980400 -3.18165400

Page 50: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S50

C -6.57296000 1.38694100 1.71289800 H -6.96826600 0.94639200 2.62152800 C -2.95740500 3.38036300 -3.07090400 H -1.88568200 3.24426000 -3.18985800 N -4.64780000 1.80913100 0.33571400 N -3.49881700 2.86834000 -1.97100600 Ag -2.31150100 1.67863900 -0.19777900

TS5 C -2.98754800 0.12128700 -0.29260100 C -4.05619500 0.49298600 0.17603200 C -5.28991500 0.94358500 0.72078400 C -5.80874700 0.36298800 1.89753500 C -6.01251400 1.97932200 0.09156500 C -7.01624600 0.80988700 2.42534400 H -5.25709400 -0.43525100 2.38411800 C -7.21940300 2.41693900 0.62852100 H -5.61603400 2.43086200 -0.81213100 C -7.72520200 1.83591600 1.79455300 H -7.40735900 0.35606600 3.33098300 H -7.76741000 3.21482800 0.13668000 H -8.66730300 2.18060000 2.20956600 P -2.66851100 -2.75199900 -2.48706200 Au -1.61127800 -0.92824700 -1.25794500 C -4.49626800 -2.79569400 -2.35028900 H -4.78084900 -2.89321600 -1.29966400 H -4.91440700 -1.86089900 -2.73205800 H -4.91012100 -3.63463700 -2.91723400 C -2.07567700 -4.39593000 -1.93112100 H -2.34147500 -4.54758800 -0.88191100 H -2.52054000 -5.19227200 -2.53538900 H -0.98820100 -4.42480900 -2.02616200 C -2.28376400 -2.66375900 -4.27714100 H -2.69192500 -3.53063400 -4.80535800 H -2.71020300 -1.75059400 -4.70026900 H -1.19849900 -2.63326100 -4.39694500 C 0.51408100 5.32613300 -0.13303700 C 0.13415300 4.02808300 -0.45162000 C -0.30712300 3.14242000 0.55604400 C -0.35516800 3.59216200 1.89340900 C 0.02670400 4.88823800 2.21619900 C 0.45558700 5.73604200 1.19685900 H 0.85393900 6.02076200 -0.89304800 H 0.17541500 3.68588800 -1.48002700

Page 51: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S51

H -0.69544000 2.91719300 2.67144100 H -0.00645900 5.25346200 3.23658100 C -0.72487500 1.82784500 0.20492000 C -1.16627700 0.73366700 -0.16969800 F 0.82535900 6.98703600 1.50778200 C 3.87885600 -4.01749800 -3.73913100 C 3.18029500 -2.94825300 -3.18430200 C 2.40596400 -3.16542800 -2.04214600 C 2.33086500 -4.42736000 -1.44978400 C 3.03932500 -5.48390400 -2.02008000 C 3.82172200 -5.29898300 -3.16923200 H 4.48314800 -3.85450000 -4.62735800 H 3.24079800 -1.95699300 -3.62061600 H 1.74419500 -4.56876200 -0.54872300 H 2.98985300 -6.46725300 -1.56033200 C 4.61189900 -6.44084300 -3.75991700 H 5.63149200 -6.45779300 -3.35585800 H 4.15440000 -7.40707300 -3.53058100 H 4.69544500 -6.35016900 -4.84663600 S 1.48016500 -1.80393800 -1.35365000 O 0.17792500 -1.79225200 -2.19963900 O 1.14473600 -2.15936300 0.05982500 O 2.25307800 -0.56104100 -1.52794100 C 3.95236500 0.69244400 1.10685300 C 3.15702500 0.64387400 3.28493800 C 5.48059000 1.20816300 2.88235400 H 3.72338700 0.54157000 0.05510700 H 6.46477200 1.48515400 3.24982800 C -0.02320100 -0.05679900 5.96010500 C 1.20306700 0.30744300 6.47669000 C 2.28649500 0.55031300 5.60327500 C 2.05641000 0.40764600 4.20665600 H -0.87402900 -0.25320800 6.60331200 H 1.34970400 0.40812700 7.54843400 C 4.42963700 1.00298000 3.80512600 C 4.61434700 1.14160300 5.22095800 H 5.59666800 1.42112400 5.59031400 C 3.58507500 0.92521800 6.08456700 H 3.72984400 1.02866900 7.15586700 C 5.24631500 1.04874100 1.53250900 H 6.03389300 1.19196300 0.80080200 C -0.15537200 -0.17345900 4.56484600 H -1.10766900 -0.45958800 4.12592300 N 2.94600200 0.50632200 1.95395700

Page 52: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S52

N 0.84194200 0.04985500 3.71623600 Ag 0.73308300 -0.06428300 1.27333500

15 C -2.01161100 1.67236400 0.08583200 C -2.79901600 0.78825900 0.47322900 C -3.59142400 -0.04934500 1.33451100 C -4.62851700 0.50676600 2.10696800 C -3.31304300 -1.42908000 1.42183900 C -5.36910100 -0.30842300 2.95974000 H -4.84363900 1.56757000 2.03173400 C -4.05957100 -2.23058400 2.28318400 H -2.51374800 -1.84709200 0.81681700 C -5.08808400 -1.67467500 3.05063300 H -6.16928200 0.12366200 3.55263000 H -3.84401000 -3.29276900 2.34928900 H -5.67279400 -2.30551200 3.71314000 P -2.92378200 -0.64963800 -3.89883400 Au -2.73156200 0.22915300 -1.75916800 C -4.61428500 -0.56246500 -4.60970900 H -5.30769400 -1.12908500 -3.98339200 H -4.94660700 0.47800400 -4.64210800 H -4.62431500 -0.97550300 -5.62297400 C -2.43170500 -2.41164400 -3.97272500 H -3.07900500 -3.00561300 -3.32323600 H -2.50552300 -2.78363200 -4.99926300 H -1.40040400 -2.48026000 -3.62106500 C -1.82654400 0.22531100 -5.07532500 H -1.88903600 -0.23622600 -6.06572600 H -2.12111500 1.27522200 -5.14477000 H -0.80693000 0.15877800 -4.68998000 C 3.13821300 4.18117000 -2.08980700 C 2.06932400 3.43591500 -1.60875400 C 0.89413100 4.09230600 -1.17252400 C 0.81369200 5.50067200 -1.22665200 C 1.88602000 6.24401300 -1.70173200 C 3.03035500 5.57052900 -2.12640600 H 4.04926700 3.70773500 -2.43878500 H 2.11760300 2.35103700 -1.56799200 H -0.09028200 5.99947400 -0.89383300 H 1.85182900 7.32643400 -1.75256100 C -0.18712500 3.31351500 -0.69933100 C -1.07595000 2.56652500 -0.31306000 F 4.06538700 6.28658600 -2.58789900

Page 53: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S53

C 3.78614600 -3.61683600 -2.62675600 C 3.07944000 -2.45142100 -2.34118000 C 1.80898000 -2.54364600 -1.76699800 C 1.25021900 -3.78921700 -1.47753200 C 1.97219200 -4.94675300 -1.76832700 C 3.24536600 -4.88216900 -2.35040800 H 4.77701200 -3.54444900 -3.06767200 H 3.50987800 -1.47726300 -2.54704500 H 0.27142000 -3.84594700 -1.01393600 H 1.54126100 -5.91659000 -1.53393200 C 4.01293100 -6.13757700 -2.68751800 H 5.07646100 -6.03119000 -2.45259000 H 3.62863200 -7.00267400 -2.14069600 H 3.94043900 -6.36571300 -3.75791500 S 0.87558800 -1.04052100 -1.46767100 O 0.12842600 -0.72900500 -2.71370400 O -0.09207000 -1.39892900 -0.33675200 O 1.85278000 -0.00125700 -1.04312500 C 3.61147600 0.72908700 1.75862700 C 2.55074700 0.60330300 3.81603600 C 4.80358400 1.48402600 3.70040700 H 3.53323800 0.54743300 0.68974700 H 5.68297900 1.90296600 4.18156700 C -0.86969800 -0.43476100 6.04174100 C 0.21452200 0.09423500 6.71120200 C 1.37545700 0.45208600 5.99016500 C 1.36995700 0.24478000 4.58414900 H -1.77521600 -0.71985300 6.56587200 H 0.18915000 0.23976400 7.78747500 C 3.67680500 1.14977900 4.48645500 C 3.63971300 1.34155000 5.90775700 H 4.51366500 1.76024600 6.39800300 C 2.53483300 1.00651300 6.62915600 H 2.51139700 1.15290000 7.70492000 C 4.77394400 1.27516300 2.33661200 H 5.62387800 1.52210400 1.70977000 C -0.78542000 -0.60438200 4.64830200 H -1.62177900 -1.01819700 4.09197500 N 2.54345700 0.40603400 2.47773300 N 0.29302300 -0.27819000 3.94230700 Ag 0.55676300 -0.57572100 1.61670800

16 P -0.37582900 1.24063800 -0.70643200

Page 54: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S54

Au -0.64823500 -0.88006800 0.28186700 C -1.32952500 2.51925800 0.17569100 H -2.39409700 2.30229200 0.08090300 H -1.05491700 2.51661900 1.23325700 H -1.09750200 3.49886500 -0.25635400 C -0.84134100 1.23147200 -2.46871800 H -1.90765000 1.02145800 -2.55776500 H -0.60491100 2.20836800 -2.90450000 H -0.27725200 0.45624800 -2.99283600 C 1.38988500 1.70109800 -0.60689400 H 1.52449100 2.68589000 -1.06874900 H 1.70489100 1.73721800 0.43761500 H 1.99513400 0.96109000 -1.13382300 C 4.96997100 -2.73869900 3.67871700 C 3.78173800 -2.22275500 3.18896900 C 3.37317000 -2.49139900 1.85717900 C 4.19559700 -3.30333800 1.03431200 C 5.38449200 -3.82163000 1.52001500 C 5.75415400 -3.53054800 2.83575300 H 5.30222500 -2.54818700 4.69293700 H 3.14988800 -1.61044900 3.82307000 H 3.88063700 -3.51819000 0.01899000 H 6.02853300 -4.44565300 0.91080400 C 2.16543200 -1.96487800 1.36136000 C 1.07303000 -1.56180900 0.94947900 F 6.89858600 -4.02890700 3.30554000 C -6.86009000 -0.26060400 -2.55316700 C -5.53778800 -0.50070900 -2.19955300 C -5.06174400 -0.10879600 -0.92735900 C -5.94815200 0.51656300 -0.02074400 C -7.26836300 0.75072400 -0.38583700 C -7.72681300 0.36508200 -1.65030900 H -7.22083900 -0.56477300 -3.53060100 H -4.86285900 -0.99587200 -2.89011500 H -5.58791600 0.80291300 0.96202000 H -7.94505100 1.22945800 0.31481400 C -3.70983700 -0.33994100 -0.56365000 C -2.55904900 -0.60334900 -0.21963800 H -8.75991400 0.54692100 -1.92986300

TS7 P -2.54291200 11.55083200 1.64060200 Au -1.95003300 9.49790500 2.79547400 C -3.68355100 12.57885900 2.64394800

Page 55: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S55

H -4.56626600 11.99017100 2.90528600 H -3.18672400 12.89106900 3.56588000 H -3.99241500 13.46570600 2.08278600 C -3.43983800 11.18505100 0.08343200 H -4.30268300 10.55320100 0.30740800 H -3.77851000 12.11015800 -0.39199700 H -2.78231100 10.64610100 -0.60323700 C -1.14882400 12.65307900 1.17627200 H -1.52412700 13.54217700 0.66032000 H -0.60614500 12.96183500 2.07324900 H -0.45920900 12.12019400 0.51693600 C -0.77218000 4.26611900 6.99240200 C -1.04298700 5.46306600 6.35257900 C -0.96695200 5.55428600 4.93796600 C -0.60116000 4.40739400 4.18550100 C -0.32966700 3.20927200 4.82272500 C -0.41984700 3.15746600 6.21692600 H -0.82327800 4.16790600 8.07078700 H -1.31518500 6.34207700 6.92643000 H -0.53638900 4.48076900 3.10545900 H -0.04881200 2.31809900 4.27308500 C -1.25010100 6.76552300 4.28920400 C -1.40032300 7.85564700 3.72426100 F -0.15856700 2.00506400 6.83153500 C -7.14605800 5.04474600 2.56492300 C -6.03174500 5.85550600 2.38508800 C -5.67000600 6.78838100 3.38276500 C -6.45401100 6.89503600 4.55338800 C -7.56570100 6.07791400 4.72043000 C -7.91400200 5.15381200 3.72935000 H -7.42047500 4.32746000 1.79800800 H -5.43125700 5.77946300 1.48462000 H -6.17744100 7.61640100 5.31517800 H -8.16489900 6.16031300 5.62161100 C -4.52447800 7.60737400 3.21287500 C -3.62019400 8.40940300 3.00236000 H -8.78510200 4.51998800 3.86358300

17 C 4.66001400 -3.57569600 -0.43204700 C 3.57326100 -2.84404300 -0.90256200 C 2.25500200 -3.21543600 -0.57041100 C 2.05490100 -4.34802500 0.24482700 C 3.13662800 -5.08517000 0.71933900

Page 56: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S56

C 4.42351600 -4.68519600 0.37342100 H 5.67955900 -3.30331200 -0.68258700 H 3.73504900 -1.97819300 -1.53589300 H 1.04232200 -4.64571300 0.49667700 H 2.99714500 -5.96121300 1.34351500 C 1.13971200 -2.46415300 -1.05355400 C 0.18472400 -1.83355500 -1.46454500 H -0.67772300 -1.31465000 -1.86049900 F 5.47434200 -5.39433300 0.83412100 C 1.23317000 3.10356100 -0.47432300 C 2.78415100 2.04447100 0.88498800 C 3.31011800 4.22648500 -0.02291000 H 0.24652800 3.04718900 -0.93127400 H 3.98774800 5.06911300 -0.13283600 C 3.81943000 -1.29537100 3.23305600 C 4.72559000 -0.26089900 3.12750100 C 4.40465400 0.87299400 2.34889200 C 3.13964600 0.89267800 1.69932700 H 4.03531300 -2.18198500 3.81908400 H 5.68569500 -0.30499300 3.63457500 C 3.70088500 3.12326500 0.77061600 C 4.96501500 3.06265100 1.44589800 H 5.64948800 3.89984600 1.34092700 C 5.30373200 1.98179900 2.20143200 H 6.26289200 1.93997600 2.70972000 C 2.07780000 4.22053700 -0.64256200 H 1.74937200 5.05415000 -1.25409600 C 2.58955400 -1.18399400 2.55923300 H 1.85572800 -1.98199000 2.61980000 N 1.58591400 2.05554300 0.26033000 N 2.25670900 -0.13108900 1.82185800 Ag 0.20464200 0.08679000 0.58944900 C -6.43697500 0.36903500 -1.02311700 C -5.07037000 0.15663200 -1.19708800 C -4.16607800 1.13065000 -0.77274200 C -4.62060000 2.31262400 -0.18728900 C -5.99004800 2.51112400 -0.01954000 C -6.91879800 1.54594600 -0.43326000 H -7.14197400 -0.38996000 -1.35391400 H -4.69884600 -0.74688500 -1.66812100 H -3.90343700 3.06661700 0.11839500 H -6.34476200 3.43231300 0.43677600 C -8.40281600 1.78346400 -0.27931800 H -8.61910800 2.42147200 0.58305700

Page 57: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S57

H -8.81813900 2.28192900 -1.16450800 H -8.94783700 0.84323400 -0.15149500 S -2.40295200 0.84412300 -0.95238400 O -2.23359400 -0.05028700 -2.12669500 O -1.76272300 2.17940900 -1.06697600 O -2.01514400 0.14122800 0.34559900

TS8 C 4.18126700 -4.82075300 -1.78846300 C 3.21829700 -3.81901900 -1.71831100 C 2.52515300 -3.56125300 -0.51623700 C 2.82688400 -4.34702700 0.61651000 C 3.78662200 -5.35259000 0.55516100 C 4.44979800 -5.57198100 -0.64832400 H 4.72085300 -5.02911300 -2.70604300 H 2.98834000 -3.22243200 -2.59473700 H 2.29445600 -4.15872600 1.54289100 H 4.02620700 -5.96527800 1.41759800 C 1.53931900 -2.53366400 -0.44992300 C 0.67074200 -1.65641400 -0.40070300 H -0.74884400 -1.60005400 -0.56551300 F 5.38305500 -6.54431900 -0.71162200 C -0.76122500 3.11184000 -1.18980300 C 1.16563100 3.68386400 -0.03521500 C -0.17287500 5.43664000 -1.03848500 H -1.42911000 2.31792300 -1.51669800 H -0.35360700 6.48724200 -1.25019800 C 4.49262800 2.46476300 2.23355400 C 4.32969700 3.81222400 1.98529700 C 3.22257200 4.25493400 1.22756100 C 2.31747600 3.26820900 0.74866700 H 5.33152200 2.09254500 2.81190800 H 5.04094200 4.54081000 2.36516900 C 0.96662800 5.06719800 -0.28849700 C 1.90514100 6.02957400 0.21340900 H 1.73017100 7.08064500 0.00115400 C 2.98970100 5.64076800 0.93874700 H 3.69662200 6.37468000 1.31540200 C -1.03901900 4.46158900 -1.48504800 H -1.92641300 4.71044600 -2.05686600 C 3.53883100 1.56542900 1.71958200 H 3.63374700 0.49699000 1.89639900 N 0.31016700 2.74027700 -0.49592700 N 2.49035100 1.95033500 1.00558200

Page 58: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S58

Ag 0.75769500 0.47168300 -0.03739300 C -5.78548400 -1.42836700 1.75021200 C -4.50423900 -1.03930800 1.36643400 C -4.25212300 -0.75981300 0.02253400 C -5.26390400 -0.85931300 -0.93196500 C -6.54018900 -1.25149100 -0.53111300 C -6.82005800 -1.54663800 0.81029800 H -5.98826400 -1.63949600 2.79723300 H -3.70859800 -0.93378400 2.09596000 H -5.04909300 -0.61673800 -1.96691600 H -7.33310100 -1.32487200 -1.27116900 C -8.19726600 -2.00059900 1.23248700 H -8.97025800 -1.61451900 0.56153500 H -8.27137500 -3.09532200 1.21965600 H -8.43321600 -1.67185800 2.24912300 S -2.60447200 -0.27828200 -0.48182700 O -1.91028500 -1.65297400 -0.71412600 O -2.72907400 0.48578300 -1.73936400 O -1.96934100 0.43220600 0.65315300

18 P 1.16062600 0.76033500 2.94698000 Au -0.31420800 0.23477500 1.22792500 C 0.39872800 1.40374100 4.49193500 H -0.15319000 2.32158200 4.27533200 H -0.30043600 0.66427400 4.88997900 H 1.16833800 1.61307900 5.24147900 C 2.38404600 2.02450500 2.43409000 H 1.87291000 2.96685200 2.22200500 H 3.12573000 2.18174700 3.22333000 H 2.87497400 1.67168400 1.52517900 C 2.13762000 -0.70674800 3.44546200 H 2.87571000 -0.43525500 4.20670900 H 1.46951400 -1.47515000 3.84206700 H 2.63765800 -1.09231100 2.55423300 C -5.82966800 -0.19789200 1.21813400 C -4.54798200 -0.59078000 0.85350200 C -3.69765700 0.30196300 0.16866200 C -4.15695100 1.59762300 -0.14662800 C -5.43763500 1.99512100 0.21598900 C -6.25197300 1.08963500 0.89329700 H -6.50340400 -0.86640800 1.74204400 H -4.19414800 -1.58896100 1.08814200 H -3.50279700 2.27997400 -0.67870800

Page 59: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S59

H -5.81499700 2.98438200 -0.01712600 C -2.39620300 -0.11440100 -0.23464100 C -1.28260200 -0.48615000 -0.61898300 H -0.48710700 -0.91044700 -1.23833100 F -7.48808900 1.47207200 1.24611200 S 2.69803300 -0.65673600 -1.16946000 S 1.33694700 -2.56653800 -2.85320900 O 2.45234500 -0.50630100 0.28724900 O 4.00238200 -1.15533900 -1.59961500 O -0.08199600 -2.90972800 -2.97942900 O 2.32864800 -3.59477300 -2.54700200 C 2.59388100 1.11169000 -1.75839000 C 1.81488800 -1.88483700 -4.52648500 F 1.39409700 1.64175600 -1.45451500 F 3.53706800 1.83777400 -1.13452400 F 2.78092300 1.19503400 -3.07417100 F 0.94019700 -0.94654400 -4.90883300 F 3.03580100 -1.34297900 -4.48199400 F 1.80763200 -2.87511600 -5.42387500 N 1.37983700 -1.25357400 -1.87919500

TS9 P 4.53920300 7.37253400 3.33226900 Au 2.75684900 6.98650800 1.88133600 C 4.22108100 8.22102600 4.93295200 H 3.79147500 9.20801000 4.74408800 H 3.50258100 7.63952300 5.51613500 H 5.14647800 8.33250200 5.50650300 C 5.85207100 8.36501500 2.51377000 H 5.47455000 9.36728500 2.29623300 H 6.74203200 8.44032000 3.14639700 H 6.10893600 7.87623000 1.57090300 C 5.37284500 5.79769600 3.77796000 H 6.27132800 5.98386900 4.37470100 H 4.68446500 5.16488100 4.34353900 H 5.63964700 5.28167500 2.85245800 C -3.13336000 5.18805800 -0.88957000 C -1.81758100 5.23858000 -0.44931600 C -1.12837600 6.47127300 -0.39888900 C -1.78914400 7.65148700 -0.80557600 C -3.11057500 7.60793400 -1.23040000 C -3.75890300 6.37490000 -1.26587300 H -3.67964100 4.25333500 -0.94750700 H -1.29459100 4.33249400 -0.16678100

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S60

H -1.25490200 8.59510200 -0.77577800 H -3.64188700 8.50093100 -1.53996600 C 0.21113800 6.51627000 0.05129000 C 1.39454700 6.51326400 0.42576400 H 2.21428200 5.93223000 -0.41192600 F -5.03507200 6.32955900 -1.68248600 S 4.71656600 5.48922800 -1.11387900 S 2.38111900 4.10035700 -2.22260300 O 5.03584300 5.63620700 0.31413600 O 5.52999700 4.63532700 -1.96906900 O 0.96964500 4.10349800 -1.84013400 O 3.14436000 2.86281100 -2.29455800 C 4.89100000 7.22838700 -1.78051500 C 2.41933100 4.84484100 -3.93927900 F 4.05166400 8.05839800 -1.14602200 F 6.14562200 7.64096100 -1.56598700 F 4.63126500 7.26009900 -3.08638200 F 1.85632900 6.05685500 -3.91960700 F 3.67346800 4.95063500 -4.37805400 F 1.72704900 4.05229100 -4.76009200 N 3.08872800 5.27423000 -1.28221100

TS10 I -1.21851100 1.45826400 -1.49977500 C -0.32841700 3.42317700 -1.43155200 O -0.76054100 1.90028100 0.78304800 C 0.13403800 3.92059200 -0.22334200 C 0.76486300 5.17341500 -0.21079300 C -0.18572000 4.13084600 -2.62481700 C 0.90951700 5.89673600 -1.39397200 H 1.14336200 5.58004700 0.71785700 C 0.43277600 5.38158100 -2.60050500 H -0.54796100 3.71960900 -3.56317100 H 1.40007800 6.86515200 -1.37150300 H 0.54548100 5.94593800 -3.52168400 C -1.81046200 -0.71625600 -0.58079200 C -2.58797500 -1.36833600 -1.28688300 C 1.58653100 -1.39637800 0.83073100 C 2.81195000 -1.50875700 0.76957500 Au -0.35877900 -1.00746100 0.96980000 P -2.22284000 -0.68950300 2.48997000 C -3.47485100 0.57282800 2.04498500 H -3.99230000 0.25532200 1.13764100 H -4.19458300 0.70806700 2.85834700

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S61

H -2.95595600 1.51034900 1.83758600 C -1.57958200 -0.15050300 4.12575900 H -2.39417200 0.01878900 4.83794000 H -0.89994000 -0.91117800 4.51737400 H -1.02133100 0.77650000 3.98117900 C -3.18462200 -2.22440300 2.81345300 H -3.99020600 -2.04572900 3.53290600 H -3.61147700 -2.57868900 1.87155300 H -2.51585100 -2.99704100 3.20085500 C 4.22767600 -1.54403500 0.71573300 C 4.93645100 -2.76249800 0.62413700 C 4.96220000 -0.33566000 0.75718600 C 6.32589700 -2.77743000 0.57546700 H 4.38044100 -3.69349500 0.59223300 C 6.35095400 -0.34371000 0.70897600 H 4.41777600 0.60013600 0.82719500 C 7.01140000 -1.56642200 0.61899000 H 6.88383900 -3.70491300 0.50510500 H 6.92724700 0.57467200 0.74018000 C -3.43735300 -2.16679100 -2.10301900 C -2.88592900 -3.04179700 -3.06491200 C -4.84184100 -2.09958900 -1.97673900 C -3.71475900 -3.81890300 -3.86820900 H -1.80689000 -3.09919300 -3.16568700 C -5.66184500 -2.87997100 -2.78669800 H -5.27579300 -1.42614600 -1.24405900 C -5.10409300 -3.74227600 -3.73444400 H -3.27534500 -4.48795100 -4.60253200 H -6.74091300 -2.81501700 -2.67934500 H -5.74723400 -4.34985000 -4.36419400 F 8.35914700 -1.57821300 0.57249200 C -0.07654900 3.05238100 1.04276900 C 1.30831800 2.67388500 1.65282000 C -0.92643900 3.85524700 2.07605100 F 1.17003300 1.83061400 2.69324400 F 2.00111900 3.74749900 2.10242900 F 2.06567600 2.06131500 0.72440600 F -0.35682600 5.01184900 2.47720600 F -1.15802300 3.12898500 3.19349200 F -2.12459500 4.15342700 1.54078100

TS11 P 3.57961000 1.42092400 -0.22589000 Au 1.44385300 0.44425700 -0.26102100

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S62

C 3.89115300 2.48255600 1.24085800 H 3.15700000 3.29148000 1.26960700 H 3.78741600 1.88951100 2.15277200 H 4.89794700 2.90907700 1.19978700 C 3.91121600 2.50266900 -1.67340200 H 3.17872100 3.31314000 -1.69993000 H 4.91806400 2.92694500 -1.61413500 H 3.81776900 1.92192300 -2.59431900 C 4.94543200 0.19212300 -0.22668900 H 5.91694800 0.69547000 -0.22201500 H 4.86507700 -0.44551800 0.65702400 H 4.86954300 -0.43909800 -1.11546100 C 1.66803400 -5.42907700 1.06916500 C 1.18218000 -5.76786800 -0.19332400 C 0.56030800 -4.80398000 -0.99915500 C 0.45096500 -3.51529000 -0.48687600 C 0.89981800 -3.15345300 0.77647300 C 1.52343000 -4.13037100 1.55719900 H 2.14984700 -6.18815800 1.67700600 H 1.28254500 -6.78181000 -0.55819100 H 0.75972100 -2.14745800 1.15323600 H 1.88409200 -3.87177400 2.54794900 C -0.05645600 -5.09963300 -2.37777600 C 0.98783700 -5.76954100 -3.31658600 C -1.30322800 -6.01433800 -2.18847700 O -0.47062600 -3.94739900 -3.01085300 I -0.54590500 -2.15177600 -1.79624000 C -0.43499800 -0.47466800 -0.36084900 C -1.41986400 0.10357400 0.20084900 C -2.12054500 1.06117800 0.98185100 C -2.73363800 2.17661600 0.36875500 C -2.15093100 0.93383700 2.38861700 C -3.35311300 3.14271400 1.15016400 H -2.71801700 2.26055300 -0.71227800 C -2.77436100 1.91054900 3.15935000 H -1.68476700 0.07392700 2.85591100 C -3.37578500 3.01206800 2.54440700 H -3.82110700 4.00085600 0.67813500 H -2.79179000 1.81359600 4.24031400 H -3.86259800 3.77043200 3.15001700 F 0.50572000 -5.90406400 -4.55860100 F 2.09368100 -5.00694400 -3.37576500 F 1.35458700 -6.99852400 -2.88663800 F -2.21247100 -5.36352600 -1.42599100

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S63

F -1.02312400 -7.18336000 -1.58558600 F -1.89195600 -6.28956900 -3.36641500 C -2.89799600 -4.34898200 3.04825000 C -2.94311500 -3.67210500 1.83509600 C -3.57386600 -2.41085000 1.73145800 C -4.17331300 -1.85939900 2.88624200 C -4.13177600 -2.53192000 4.10384300 C -3.49015300 -3.76539400 4.16626700 H -2.42249100 -5.31927200 3.14115600 H -2.50558700 -4.11913900 0.94870700 H -4.67971800 -0.90341000 2.81100800 H -4.59368100 -2.12424900 4.99649200 C -3.61179300 -1.72166900 0.48693200 C -3.65623400 -1.14203400 -0.60590100 F -3.44412100 -4.41747200 5.34146200 C -3.28569300 -3.40574900 -4.63455300 C -4.45511200 -1.71785300 -5.69027000 C -3.75224100 -3.65040000 -6.97348600 H -2.84192200 -3.78083500 -3.71971000 H -3.69923400 -4.19659000 -7.91121900 C -6.42493200 1.99752400 -5.44829200 C -6.39024100 1.34952200 -6.66588300 C -5.73321600 0.10453100 -6.77725300 C -5.12640900 -0.43279700 -5.60883400 H -6.92472400 2.95219300 -5.32727400 H -6.86472900 1.78222200 -7.54216800 C -4.41506500 -2.40121900 -6.93494600 C -5.03413000 -1.82022900 -8.09109100 H -4.98989700 -2.36288500 -9.03090800 C -5.66805200 -0.61789100 -8.01528300 H -6.13897700 -0.18361100 -8.89214300 C -3.18485300 -4.15564000 -5.82302200 H -2.66113100 -5.10475300 -5.80767000 C -5.79514400 1.39355300 -4.34711700 H -5.80622500 1.87651900 -3.37465600 N -3.89233100 -2.22760200 -4.57010700 N -5.16520200 0.22309200 -4.41815500 Ag -4.20681700 -0.73340000 -2.55848000

19 P 2.11378400 -5.82623000 1.17312600 Au 0.57896300 -4.16299600 0.48478800 C 1.52214900 -7.53948800 0.85950500 H 0.58433600 -7.70474500 1.39543800

Page 64: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S64

H 1.33197300 -7.66926400 -0.20880000 H 2.26205300 -8.27561000 1.18798700 C 2.52139200 -5.80480800 2.96764000 H 1.60671700 -5.93522600 3.55137500 H 3.22597500 -6.60377400 3.21776900 H 2.96240300 -4.84005300 3.23062900 C 3.75005500 -5.74529400 0.33548200 H 4.40807500 -6.54669400 0.68499300 H 3.61240400 -5.83724900 -0.74475500 H 4.21744000 -4.77899100 0.54069900 C 1.67608600 -0.38931800 -4.69222900 C 1.84882200 0.68809300 -3.82561600 C 1.36393800 0.64913400 -2.50726100 C 0.71867900 -0.52201200 -2.11271000 C 0.53414100 -1.61258700 -2.95447200 C 1.01792800 -1.53939200 -4.26136400 H 2.05871400 -0.32483300 -5.70579100 H 2.36360200 1.57270700 -4.17497200 H 0.02509800 -2.50170200 -2.60059400 H 0.87681500 -2.38104000 -4.93229900 C 1.54350400 1.83184800 -1.52348100 C 3.06642700 2.00210600 -1.22600800 C 0.96329800 3.13228100 -2.16539900 O 0.88365600 1.59157900 -0.34940900 I 0.00073300 -0.70164200 -0.08973100 C -0.73043700 -2.73675000 -0.17823500 C -2.00166400 -2.87627400 -0.67420100 C -2.69505100 -4.20360200 -0.61736900 C -2.72138800 -4.95590200 0.56802800 C -3.35657700 -4.70082400 -1.75160000 C -3.37459700 -6.18844500 0.60899000 H -2.25670000 -4.55505800 1.46299600 C -3.99582500 -5.93859000 -1.71165100 H -3.36214100 -4.11411000 -2.66511200 C -4.00616500 -6.68701600 -0.53180500 H -3.40438000 -6.75093400 1.53778200 H -4.49252300 -6.31649900 -2.60034300 H -4.51597200 -7.64521900 -0.49871200 F 3.28501700 3.01153200 -0.34451300 F 3.54041200 0.87673000 -0.66743200 F 3.80750500 2.27172600 -2.31716800 F -0.32410400 2.94070300 -2.50569600 F 1.62597700 3.54394600 -3.26425700 F 0.99385500 4.16744800 -1.28997700

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S65

C -6.14126500 0.97069400 -3.45767600 C -5.44807000 -0.05532900 -2.82623000 C -4.08258200 0.09278600 -2.50336100 C -3.42649600 1.29913100 -2.83089600 C -4.11545400 2.32845400 -3.46149200 C -5.46271300 2.14751700 -3.76488500 H -7.19054900 0.87537900 -3.71385900 H -5.95635300 -0.98034600 -2.57566700 H -2.37621000 1.42075800 -2.58988800 H -3.62769300 3.26128100 -3.72171300 C -3.37328100 -0.95645900 -1.85778100 C -2.73408200 -1.82934700 -1.29589600 F -6.12996200 3.14136800 -4.37395400 C 2.51337100 5.87051500 1.22914600 C 1.26556900 5.59115800 3.15824300 C 2.57014000 7.61333900 2.87426100 H 2.81478600 5.45234200 0.27378000 H 2.91153100 8.57914900 3.23588700 C -1.38193800 3.23288700 5.43294600 C -0.97820700 4.44864400 5.94489300 C -0.09004000 5.25953700 5.20426200 C 0.35479700 4.77528300 3.94388400 H -2.06452500 2.58743200 5.97449700 H -1.33524700 4.79332800 6.91119300 C 1.68719400 6.84765500 3.66933100 C 1.21537000 7.29674800 4.94744800 H 1.55285600 8.26104100 5.31567100 C 0.36208900 6.53408600 5.68414300 H 0.00619200 6.87823700 6.65059700 C 2.98560300 7.12731100 1.65176700 H 3.66152500 7.69128900 1.01845700 C -0.88997100 2.83502000 4.17788700 H -1.19059000 1.88442700 3.74733300 N 1.68537400 5.13102700 1.95659900 N -0.05197300 3.57409800 3.45679800 Ag 0.78470700 2.97594400 1.34640900

TS12 P 2.99228700 -0.49258500 1.91315200 Au 0.75295800 -0.47935900 1.19237400 C 3.59232700 -2.18149300 2.32573300 H 2.96879400 -2.61212500 3.11303200 H 3.52406100 -2.82022900 1.44174000 H 4.63165800 -2.14701300 2.66641200

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S66

C 3.28306900 0.49833800 3.43009600 H 2.64583500 0.12723000 4.23650300 H 4.33205100 0.42901200 3.73359900 H 3.03210500 1.54168000 3.23012000 C 4.18612400 0.14480100 0.67495400 H 5.20977800 0.02774200 1.04356600 H 4.07159700 -0.40376900 -0.26260300 H 3.99230700 1.20245800 0.49222400 C 3.17191000 2.65398000 -2.89388300 C 3.62405000 3.58383200 -1.96239800 C 2.91428400 3.88161500 -0.78281700 C 1.73188000 3.15674700 -0.55930800 C 1.26765000 2.22134200 -1.49427300 C 1.97981800 1.97179500 -2.66496600 H 3.74953600 2.47308100 -3.79524100 H 4.55077300 4.10438300 -2.16183900 H 0.33914300 1.69465000 -1.30571800 H 1.60004200 1.25379100 -3.38608700 C 3.45673200 4.96044900 0.21209500 C 4.59446300 4.27885900 1.05079700 C 4.08827900 6.16097200 -0.58942800 O 2.48408200 5.42743400 1.01147300 I 0.49378000 3.28294700 1.18505900 C -1.17221300 -0.49736300 0.56250300 C -2.34591200 -0.24305600 0.13329200 C -2.24941100 -1.86190000 0.39563800 C -2.82623000 -2.37161900 1.57925400 C -2.05678100 -2.70240400 -0.72248100 C -3.19970600 -3.70844600 1.64035000 H -2.96715100 -1.71027200 2.42789300 C -2.43361600 -4.03747000 -0.65056100 H -1.61293300 -2.29291500 -1.62396600 C -3.00190600 -4.53714600 0.52847600 H -3.64171700 -4.10951200 2.54655800 H -2.28718500 -4.69140700 -1.50398600 H -3.29338100 -5.58191600 0.58104400 F 5.23073900 5.16431400 1.85803800 F 4.06241100 3.32790700 1.85962500 F 5.54828000 3.66702600 0.31626700 F 3.24268100 6.59125400 -1.53798900 F 5.27551400 5.87918400 -1.19046400 F 4.33800900 7.20705100 0.23151100 C -7.86156700 1.78950700 -1.97778500 C -6.76448500 1.08610200 -1.49730000

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S67

C -5.54406300 1.74994600 -1.24862500 C -5.44687700 3.13696400 -1.49272700 C -6.54209900 3.84317300 -1.97328900 C -7.73236200 3.15775800 -2.20803400 H -8.80868900 1.30060400 -2.17615000 H -6.84198900 0.02036800 -1.31086300 H -4.50947400 3.64852600 -1.30294400 H -6.49037500 4.90825700 -2.16899800 C -4.42273700 1.03275600 -0.75857000 C -3.45432900 0.42243000 -0.33845100 F -8.78970100 3.83788200 -2.67155200 C 5.33400400 7.00820200 4.69643900 C 3.68309900 8.55565000 5.17103100 C 5.67802800 8.49685000 6.54478100 H 5.66217000 6.19681600 4.05357900 H 6.26934200 8.87515500 7.37402800 C -0.05984100 10.22889100 4.22246400 C 0.63815800 10.74978700 5.29254100 C 1.89645600 10.20744200 5.63657300 C 2.38885700 9.13223900 4.84846200 H -1.02670800 10.62372200 3.93026400 H 0.23509500 11.57374200 5.87475500 C 4.42138600 9.08010000 6.26587200 C 3.88535800 10.16417000 7.03797000 H 4.46972200 10.54672700 7.86969100 C 2.67351500 10.70544500 6.73550000 H 2.27307100 11.52786400 7.32093600 C 6.13819600 7.45927600 5.76015900 H 7.09976300 6.99317700 5.94591600 C 0.50791000 9.16269400 3.50161700 H -0.01437100 8.73025200 2.65292300 N 4.14973000 7.53603900 4.41315300 N 1.68777100 8.63079200 3.80166800 Ag 2.70018500 6.86105400 2.58223300

20 P 1.39969100 -3.40798700 -1.47602200 Au -0.90815100 -3.36597800 -1.08302700 C 1.91596400 -5.00417500 -2.22537500 H 1.63158400 -5.82909300 -1.56770800 H 1.41243800 -5.13720700 -3.18594000 H 2.99921600 -5.02038100 -2.38010600 C 2.39085900 -3.24765900 0.05859700 H 2.09518300 -4.02053700 0.77195600

Page 68: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S68

H 3.45561500 -3.35529300 -0.17017400 H 2.21652600 -2.26380400 0.49763900 C 2.02727000 -2.11145400 -2.60895400 H 3.07710900 -2.30781600 -2.84837700 H 1.43717200 -2.10094900 -3.52742900 H 1.94682400 -1.13562800 -2.12877000 C 0.15256100 1.19378400 -4.13208700 C 0.83876200 1.74118700 -3.05137900 C 0.46135300 1.50377100 -1.71569100 C -0.62684200 0.63829200 -1.51246800 C -1.32583500 0.08640800 -2.59469600 C -0.94460900 0.36675500 -3.90532000 H 0.47404900 1.42334100 -5.14345800 H 1.68554800 2.38325100 -3.25154200 H -2.17937800 -0.55551700 -2.40782000 H -1.50589300 -0.05696400 -4.73333100 C 1.24203600 2.17571300 -0.53649400 C 2.51812400 1.30309300 -0.27490000 C 1.71182700 3.61981700 -0.95676100 O 0.48314800 2.25724000 0.56743800 I -1.35720600 -0.02797300 0.38647900 C -3.02174100 -3.69066100 -0.45825200 C -3.39061500 -3.47343100 -1.64118900 C -3.38116500 -4.05976200 0.89166600 C -4.70242000 -4.48244500 1.14854200 C -2.45709700 -4.01103600 1.95086400 C -5.07970600 -4.84860800 2.43585800 H -5.41816000 -4.52189400 0.33394000 C -2.84467000 -4.37778500 3.23679200 H -1.44258500 -3.67592200 1.76000400 C -4.15361900 -4.79849800 3.48215000 H -6.09804100 -5.17410400 2.62389600 H -2.12462600 -4.33565700 4.04802000 H -4.45247900 -5.08665700 4.48525500 F 3.32157000 1.84340700 0.66877300 F 2.14830500 0.07801000 0.18088300 F 3.28328900 1.08713800 -1.36990300 F 0.68714800 4.32358400 -1.45700500 F 2.71943500 3.64744000 -1.87039100 F 2.18276000 4.30300900 0.11526900 C -5.34810700 -1.05435500 -7.00487500 C -4.93037300 -1.34525900 -5.71432200 C -4.55533200 -2.66390100 -5.36355200 C -4.61304800 -3.68496400 -6.34111100

Page 69: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S69

C -5.03042400 -3.39733400 -7.63240700 C -5.39070300 -2.08588700 -7.94309800 H -5.64244000 -0.05280800 -7.29741500 H -4.89238100 -0.56299200 -4.96383100 H -4.32972300 -4.69670500 -6.07182400 H -5.08447500 -4.16225900 -8.39876100 C -4.13014000 -2.95626800 -4.05003600 C -3.76437800 -3.20637800 -2.90451300 F -5.79246500 -1.80727600 -9.18712800 C 4.08488100 4.55728700 2.83599900 C 2.80023000 4.55166000 4.75757400 C 4.98459400 5.59683500 4.80144600 H 4.15721400 4.27004200 1.79112800 H 5.76839900 6.13354900 5.32868300 C -0.79464700 3.49604800 6.67853300 C 0.16593200 4.16761400 7.40647800 C 1.38242800 4.53290700 6.78868400 C 1.56178000 4.18314900 5.42271700 H -1.74072400 3.20430100 7.12107800 H -0.00056800 4.42273600 8.44929900 C 3.79803800 5.25127400 5.48750500 C 3.57736600 5.58178800 6.86606600 H 4.35582000 6.11650100 7.40246900 C 2.41796700 5.23656200 7.49034300 H 2.25436600 5.49074800 8.53343200 C 5.13109500 5.25180800 3.47342600 H 6.02817200 5.50557700 2.91916100 C -0.52882200 3.19123100 5.33199400 H -1.26454700 2.66531100 4.73066000 N 2.96273800 4.21946000 3.45696300 N 0.60657100 3.51918300 4.72277500 Ag 1.04563400 3.03681400 2.47723100

TS11' P 1.63463200 -4.44075900 -2.04973300 Au 0.65266900 -2.43115700 -1.31595200 C 1.16078800 -4.92931800 -3.75802300 H 0.07497900 -5.03742600 -3.81914400 H 1.47275700 -4.15300600 -4.46133100 H 1.63441500 -5.87543400 -4.03704900 C 1.20461500 -5.90202000 -1.01946100 H 0.12074800 -6.04222600 -1.01812400 H 1.68565200 -6.80495900 -1.40751600 H 1.53349700 -5.73296200 0.00895800

Page 70: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S70

C 3.47247700 -4.40619200 -2.06553500 H 3.87678500 -5.35995600 -2.41770200 H 3.81779400 -3.60283900 -2.72115000 H 3.84331000 -4.20702600 -1.05692600 C 3.39045100 2.39591300 -3.61988100 C 3.97404000 2.59387800 -2.36840600 C 3.36332000 2.08981700 -1.21210600 C 2.18300100 1.37542900 -1.37632200 C 1.57667600 1.15519600 -2.60540400 C 2.19816200 1.68208200 -3.74154500 H 3.87188400 2.80421800 -4.50275500 H 4.89977400 3.14814900 -2.28308400 H 0.65314200 0.59541900 -2.68630100 H 1.73961500 1.53431500 -4.71451500 C 3.92679600 2.23670100 0.21173000 C 5.16657200 1.30572900 0.36096800 C 4.30453700 3.71700100 0.50865500 O 2.99270700 1.88328300 1.16620800 I 1.36852800 0.64735500 0.46546900 C -0.15958600 -0.67131800 -0.65266100 C -1.31024700 -0.11183600 -0.62000800 C -2.21818600 0.95739300 -0.33059600 C -2.29505100 2.06680700 -1.19930700 C -2.99907800 0.94344500 0.84384200 C -3.12924200 3.13746100 -0.88991400 H -1.69166800 2.08237700 -2.10023900 C -3.82951700 2.01727800 1.14254300 H -2.94593000 0.08513400 1.50539700 C -3.89766000 3.11445500 0.27682300 H -3.17697700 3.99288000 -1.55643200 H -4.42395100 2.00415900 2.05075600 H -4.54676400 3.95169600 0.51434100 F 5.71417500 1.39687900 1.57724500 F 4.77364200 0.02246500 0.17752300 F 6.12552000 1.56685700 -0.55051400 F 3.25752700 4.51435400 0.23648200 F 5.35045600 4.13702800 -0.24271800 F 4.63748000 3.88220900 1.79163400 C -3.10667400 0.91215900 -5.53023000 C -3.32136600 0.32555800 -4.28771900 C -2.47079300 -0.69862100 -3.81194400 C -1.39934200 -1.12077200 -4.63112100 C -1.17755800 -0.53839300 -5.87418800 C -2.03617900 0.47153100 -6.30441000

Page 71: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S71

H -3.75314300 1.69589800 -5.90958000 H -4.15155900 0.64996200 -3.66970000 H -0.74917100 -1.91372300 -4.27613400 H -0.36464800 -0.85631900 -6.51817900 C -2.68750500 -1.28364800 -2.53493500 C -2.87484500 -1.76506500 -1.40647500 F -1.82471900 1.03416300 -7.50511700 C -2.43052300 -3.40307900 3.24651800 C -4.49642800 -4.38541100 2.89590500 C -3.43028800 -4.60386800 5.06285600 H -1.61628000 -2.81526100 2.83220000 H -3.42700700 -4.97381900 6.08425400 C -7.71449900 -5.16750900 0.30812700 C -7.77383900 -5.66889600 1.59224500 C -6.70777500 -5.42429700 2.48742500 C -5.61067700 -4.66060800 2.00721900 H -8.51598000 -5.33641300 -0.40269700 H -8.62933800 -6.24918900 1.92618600 C -4.53059200 -4.88938300 4.22428300 C -5.65815000 -5.65741700 4.66980400 H -5.65978300 -6.02983800 5.68983800 C -6.70342800 -5.91399400 3.83615700 H -7.55419500 -6.49501400 4.17962300 C -2.37540700 -3.85959800 4.57519200 H -1.51608800 -3.62252200 5.19275200 C -6.58316700 -4.42171000 -0.07406100 H -6.50477200 -4.01145200 -1.07735100 N -3.45196700 -3.65274100 2.43227000 N -5.56674700 -4.17680200 0.74350600 Ag -3.56292300 -2.85154400 0.21971200

19' P 1.52893400 -3.50270900 -1.45151700 Au 0.31925000 -1.46539500 -1.15702700 C 1.30846700 -4.36678200 -3.06099400 H 0.26841500 -4.68561400 -3.16837800 H 1.54460500 -3.68128900 -3.87891100 H 1.96076500 -5.24272400 -3.12760200 C 1.22024300 -4.80435700 -0.18738500 H 0.17237000 -5.11298600 -0.22025100 H 1.85816000 -5.67578700 -0.36343500 H 1.43264100 -4.40103600 0.80590600 C 3.33536200 -3.17288500 -1.33593500 H 3.90881000 -4.10256800 -1.40124700

Page 72: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S72

H 3.63455100 -2.50660600 -2.14942300 H 3.55649400 -2.67002000 -0.39082200 C 4.73654700 1.20397100 -2.59861300 C 4.96759000 1.30644700 -1.22592600 C 3.89468000 1.37414600 -0.32632200 C 2.61402900 1.29592200 -0.85428200 C 2.34875700 1.19882800 -2.21573900 C 3.43383700 1.15594900 -3.09666500 H 5.58042500 1.17408400 -3.28090500 H 5.98210100 1.35046800 -0.85081200 H 1.33066200 1.16624300 -2.58745200 H 3.25424000 1.10087400 -4.16624800 C 4.03065000 1.49901600 1.20985200 C 4.44731700 0.10072500 1.76760100 C 5.10265900 2.56569900 1.58338800 O 2.85829900 1.89299000 1.78653000 I 1.03165100 1.39681400 0.59000800 C -0.38305200 0.43320700 -0.79724500 C -1.55812300 1.03931900 -1.12477000 C -1.93508000 2.47016800 -0.87472900 C -1.11747600 3.51658700 -1.32757300 C -3.12976600 2.78236000 -0.20694800 C -1.47742000 4.84436600 -1.09896700 H -0.20561500 3.28999600 -1.87123700 C -3.48418500 4.11029500 0.02712800 H -3.77769900 1.98058900 0.13718500 C -2.65833100 5.14481400 -0.41773000 H -0.83694800 5.64378100 -1.45879300 H -4.40500900 4.33728700 0.55606700 H -2.93628700 6.17902500 -0.23952800 F 4.59350300 0.10760900 3.09547900 F 3.47112400 -0.80841000 1.47141100 F 5.58752600 -0.37512600 1.22313500 F 4.83400300 3.72235200 0.95540300 F 6.35988600 2.19026400 1.23060300 F 5.11243100 2.79277800 2.90046800 C -6.82988600 -0.58765800 -4.06317400 C -5.80395300 -0.14442000 -3.23529600 C -4.52290500 -0.72966500 -3.30534200 C -4.29329600 -1.76846600 -4.23185200 C -5.31596100 -2.21625800 -5.06174900 C -6.57103900 -1.61890200 -4.96241200 H -7.81950400 -0.14616200 -4.02551100 H -5.98456200 0.66265100 -2.53338500

Page 73: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S73

H -3.30300800 -2.20675100 -4.30762600 H -5.15517800 -3.00469600 -5.78882400 C -3.46962900 -0.25035700 -2.46248000 C -2.57431800 0.27030500 -1.79568900 F -7.55877900 -2.05130000 -5.75900500 C -1.61330300 -2.05482600 2.44105600 C -3.09881100 -3.74076000 1.87470300 C -2.26385500 -3.60382500 4.14864400 H -1.04366800 -1.19199800 2.10767200 H -2.22841000 -3.97709500 5.16815900 C -5.50467100 -5.62438300 -1.02726300 C -5.49302500 -6.13884700 0.25274600 C -4.69312800 -5.52955200 1.24555600 C -3.92280900 -4.39487800 0.87096000 H -6.11145300 -6.06550900 -1.81026900 H -6.09388500 -7.00630300 0.51058500 C -3.07719400 -4.26093600 3.19742500 C -3.86608500 -5.41202600 3.52993500 H -3.83241900 -5.78648000 4.54861600 C -4.64378300 -6.01987400 2.59304100 H -5.24273900 -6.88841100 2.84975500 C -1.52735300 -2.49922800 3.77296200 H -0.89313000 -1.97293500 4.47774000 C -4.70739300 -4.50090700 -1.30831000 H -4.69850300 -4.06721500 -2.30451800 N -2.37194300 -2.64993000 1.52696000 N -3.94080600 -3.90858300 -0.39728600 Ag -2.65312100 -1.93946800 -0.73937200

TS12' P 3.59239900 -0.97680400 0.75719200 Au 1.22580900 -0.77507100 0.71862600 C 4.24237000 -2.69877300 0.75890700 H 3.85276800 -3.23648600 1.62684300 H 3.91003400 -3.21527900 -0.14502900 H 5.33626300 -2.69973600 0.79366000 C 4.34674600 -0.18455900 2.23402200 H 3.91811900 -0.60540700 3.14668100 H 5.42975500 -0.34100400 2.23652200 H 4.14038900 0.88809200 2.20422200 C 4.42418600 -0.15695300 -0.66034000 H 5.49756100 -0.36888000 -0.63963700 H 4.00053300 -0.50981000 -1.60289300 H 4.27397600 0.92210900 -0.58619900

Page 74: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S74

C 2.57434900 2.86688200 -3.64444900 C 3.01864800 3.77067400 -2.68063100 C 2.59179900 3.68257800 -1.34536100 C 1.74120200 2.63104300 -1.02172900 C 1.28556900 1.71155400 -1.96548300 C 1.70247700 1.83668000 -3.29161300 H 2.91072100 2.97098800 -4.67167600 H 3.69625500 4.56510800 -2.96538300 H 0.61329600 0.91151300 -1.67309200 H 1.34439900 1.13419200 -4.03885800 C 3.04015100 4.67572400 -0.22600400 C 4.51284400 4.30514000 0.15681900 C 2.99557100 6.14216500 -0.77376300 O 2.25592700 4.62977200 0.85972500 I 1.11866000 2.37771800 1.02244700 C -0.78922100 -0.83388600 0.64001500 C -2.01250600 -0.50123500 0.34804200 C -1.99891900 -1.07372900 1.84737100 C -2.04113100 -0.12595300 2.90583100 C -2.41033700 -2.41369700 2.09477100 C -2.47755900 -0.51258200 4.16770400 H -1.72666000 0.89386600 2.70936500 C -2.83711500 -2.78351400 3.35749700 H -2.35896300 -3.13651000 1.28663900 C -2.87157000 -1.83491500 4.39650600 H -2.50694300 0.21126700 4.97590300 H -3.14036300 -3.80770200 3.55043900 H -3.20546600 -2.13424200 5.38514600 F 5.00979800 5.12211200 1.09165400 F 4.53751800 3.03888500 0.67316900 F 5.37544500 4.30138600 -0.88697800 F 1.78619400 6.39575300 -1.31187300 F 3.92404500 6.40149900 -1.73735100 F 3.20588300 7.02453100 0.20915100 C -5.77302700 3.69835800 -2.56524600 C -5.39687900 2.43392500 -2.12646800 C -4.22576700 2.25293300 -1.36706700 C -3.42702100 3.37837600 -1.06256700 C -3.79554200 4.64502400 -1.49574300 C -4.96593200 4.78623000 -2.23990600 H -6.66811800 3.85492600 -3.15666800 H -6.00756200 1.57390300 -2.38488400 H -2.51555100 3.24989400 -0.48816100 H -3.19160600 5.51728500 -1.27156900

Page 75: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S75

C -3.80300700 0.95430200 -0.89908700 C -2.94929600 0.25635100 -0.30436000 F -5.32546400 6.00476000 -2.65950600 C -8.35012000 0.00512200 -0.84592000 C -7.98635500 -2.21781800 -1.38748400 C -10.26003800 -1.40946900 -1.14374600 H -7.91267900 0.97531500 -0.62676300 H -11.33257200 -1.58014700 -1.16241600 C -5.28838000 -5.34990800 -2.20364900 C -6.64116600 -5.61710300 -2.24960200 C -7.56896600 -4.58723100 -1.97588100 C -7.05610100 -3.29972700 -1.66084700 H -4.55099500 -6.11676800 -2.41287200 H -7.00488500 -6.61052800 -2.49578100 C -9.38210000 -2.48123500 -1.42410600 C -9.85708900 -3.79743700 -1.74000100 H -10.92880300 -3.96993300 -1.76311800 C -8.98614400 -4.80814200 -2.00815100 H -9.34933400 -5.80210300 -2.25084200 C -9.74638600 -0.16310500 -0.85054400 H -10.39272100 0.67889400 -0.62907900 C -4.87076100 -4.04878300 -1.87673800 H -3.81316400 -3.80598500 -1.83227900 N -7.50022900 -0.98263600 -1.10646200 N -5.71935200 -3.05868800 -1.61112000 Ag -5.10469500 -0.87818100 -1.11692000

TS13 C 4.47651100 -2.18580100 -0.07522400 C 3.47371400 -2.96925000 -0.64802200 C 2.19836300 -2.43282800 -0.87148900 C 1.98360800 -1.11887200 -0.47295400 C 2.95196100 -0.31252000 0.10359100 C 4.22204800 -0.86496200 0.29597300 H 5.46282400 -2.61205500 0.07783500 H 3.67997000 -3.99348800 -0.93111400 H 2.74025500 0.71416200 0.37765400 H 5.00629100 -0.24982800 0.72538500 C 1.01379400 -3.20466300 -1.47828900 C 1.42637800 -3.91484300 -2.79951100 C 0.49639900 -4.23810300 -0.43347700 O -0.02327500 -2.35625000 -1.80952300 I -0.01035700 -0.43906500 -0.83738600 C 0.31571100 1.38384500 0.26775100

Page 76: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S76

C -0.05933500 2.12653500 1.23555400 C -0.27448000 3.48813900 1.69308200 C -0.43599700 3.78560900 3.05845500 C -0.34610100 4.53156700 0.74746000 C -0.65162000 5.09688800 3.47393500 H -0.38814600 2.98516600 3.79126200 C -0.57083100 5.83863700 1.17224800 H -0.20632200 4.30098500 -0.30253300 C -0.72206100 6.12589500 2.53198100 H -0.76921400 5.31556400 4.53068200 H -0.62515400 6.63751600 0.43882900 H -0.89607900 7.14749000 2.85594100 F 0.36255100 -4.45801200 -3.40917500 F 1.96770900 -3.01427500 -3.64389200 F 2.33145100 -4.89600100 -2.60359500 F 0.09522600 -3.56515900 0.68588500 F 1.44292400 -5.11261100 -0.04746300 F -0.55382900 -4.92602800 -0.88471700 P -0.40809400 -1.45416600 4.02135400 Au -0.21750400 0.37169700 2.56922500 C -1.81778600 -2.55175300 3.59984000 H -2.74988300 -1.98197100 3.60890200 H -1.66306500 -2.96167700 2.59878400 H -1.88799700 -3.37381400 4.31866800 C -0.63662800 -0.99530100 5.78333600 H -1.54666400 -0.40035300 5.89324500 H -0.71521000 -1.89230800 6.40487300 H 0.21340400 -0.39691300 6.12020400 C 1.06885200 -2.54277600 3.96877800 H 0.95558500 -3.37562900 4.66964400 H 1.18056800 -2.93632900 2.95574800 H 1.96253500 -1.96999100 4.22693900 C 4.64665000 4.56643800 0.91538600 C 3.43241900 4.24697700 0.31539700 C 3.36616600 3.30400800 -0.73358700 C 4.56636300 2.69778600 -1.16750000 C 5.78566700 3.01770800 -0.57789500 C 5.80632100 3.94678300 0.45880400 H 4.70913700 5.28998500 1.72095700 H 2.52139700 4.72920000 0.65242800 H 4.53028000 1.98152900 -1.98158400 H 6.71464000 2.56850400 -0.91236800 C 2.12505800 2.97563000 -1.35859900 C 1.06265200 2.69635200 -1.92783200

Page 77: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S77

F 6.98197000 4.25402700 1.03616000 C -2.40727600 4.21555300 -5.07803900 C -2.37330800 2.04481800 -5.88855400 C -3.81869200 3.68676900 -6.93901200 H -2.02135400 4.92494800 -4.35215400 H -4.55180400 3.95769600 -7.69358400 C -0.85883600 -1.87125600 -5.65636200 C -1.79090500 -1.58958900 -6.63263100 C -2.31632200 -0.28097400 -6.73929000 C -1.85106200 0.69179300 -5.81388300 H -0.43938200 -2.86285400 -5.52997800 H -2.13077600 -2.35826400 -7.32116900 C -3.33290000 2.36147900 -6.88849100 C -3.77452000 1.34897700 -7.80413900 H -4.50786800 1.61861000 -8.55828000 C -3.28676600 0.08021100 -7.73207500 H -3.62437500 -0.68204300 -8.42816800 C -3.35606400 4.61883700 -6.03313600 H -3.70630100 5.64499100 -6.04545500 C -0.45324100 -0.83483300 -4.79333800 H 0.27552000 -1.03750800 -4.01637100 N -1.93086900 2.97538500 -5.00305100 N -0.93280400 0.40043500 -4.86210100 Ag -0.33456200 2.39954600 -3.43475600

TS13' C 3.78880100 1.45085500 1.59715900 C 3.48251000 1.62767200 0.24779900 C 2.77553400 2.76155900 -0.17501900 C 2.37740100 3.66334300 0.80261900 C 2.65727500 3.51754600 2.15312600 C 3.38383200 2.38985300 2.54710900 H 4.35405100 0.57679100 1.90477100 H 3.80461600 0.89730700 -0.48329700 H 2.33186300 4.26074600 2.87236500 H 3.63484400 2.25589600 3.59473600 C 2.39011000 3.06609900 -1.63338100 C 3.61049200 2.88374000 -2.58113100 C 1.21828000 2.12812100 -2.05195600 O 1.97856900 4.37648500 -1.77566700 I 1.30214800 5.33571000 0.01153400 C 0.87869200 6.10306800 1.96989700 C 1.01330600 7.07415400 2.80164100 C 2.09382100 8.07206200 2.95175900

Page 78: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S78

C 3.38520100 7.80275300 2.45780000 C 1.85380500 9.31017000 3.57204900 C 4.39901900 8.74926900 2.57479900 H 3.59328200 6.84561900 1.99028000 C 2.86796500 10.26117200 3.67297100 H 0.86324600 9.52468100 3.96098600 C 4.14326900 9.98348700 3.17832800 H 5.38980200 8.52454500 2.19163400 H 2.66252100 11.21751100 4.14429400 H 4.93483000 10.72135800 3.26543000 F 3.33429300 3.32159700 -3.81122000 F 4.65917100 3.57796600 -2.10793500 F 3.98503500 1.58506400 -2.68127700 F 0.14342600 2.39189400 -1.26635700 F 1.51698600 0.82309800 -1.89315600 F 0.85341500 2.32115800 -3.32248900 P -2.42888100 7.17892400 5.66220600 Au -0.65823800 7.06530500 4.13962400 C -2.98661200 8.88308200 6.06382800 H -2.16302100 9.44218800 6.51468500 H -3.28866900 9.39415800 5.14632000 H -3.83166200 8.86107600 6.75861800 C -2.06234700 6.41331400 7.29364700 H -1.21405600 6.92442500 7.75546400 H -2.93039500 6.48296100 7.95624500 H -1.80121700 5.36157400 7.15196200 C -3.93500000 6.31220600 5.06539500 H -4.71578200 6.31565700 5.83204100 H -4.30981700 6.80862000 4.16694100 H -3.67930400 5.28343600 4.80089300 C -3.81492100 7.72444000 -0.17148100 C -3.11005400 7.07478600 0.83497100 C -2.49165200 5.82664600 0.59961200 C -2.60236200 5.24888400 -0.68676200 C -3.30721600 5.89201600 -1.69762800 C -3.90464100 7.12021500 -1.42374100 H -4.29285900 8.68397000 -0.00719400 H -3.02035500 7.53116800 1.81570700 H -2.12353300 4.29494800 -0.88275800 H -3.40053800 5.46104700 -2.68830100 C -1.76286100 5.15801900 1.62238100 C -1.09151000 4.54132000 2.46411900 F -4.58731800 7.74329100 -2.39630800 C -1.38488700 -0.11582000 2.92579200

Page 79: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S79

C -0.18417700 0.01748300 4.89361200 C -0.98238500 -2.14275700 4.14242200 H -1.80823500 0.41375500 2.07639500 H -1.07658000 -3.21701700 4.27365000 C 1.90375400 2.38285800 7.68111900 C 1.81353400 1.02469900 7.90957600 C 1.11741800 0.20634500 6.99279200 C 0.53130400 0.83263500 5.85887300 H 2.43372700 3.03835200 8.36338000 H 2.27255600 0.57462300 8.78529400 C -0.28197700 -1.38333300 5.10732900 C 0.32008700 -1.97509500 6.26753500 H 0.22967100 -3.04806900 6.40881200 C 0.99198400 -1.21194900 7.17273100 H 1.44718600 -1.66439700 8.04861300 C -1.53528800 -1.51081400 3.04768800 H -2.07721500 -2.06445300 2.28876900 C 1.29030000 2.91457900 6.53373300 H 1.34262300 3.97950000 6.32521800 N -0.73423000 0.62280200 3.81536800 N 0.62567500 2.17205600 5.65141800 Ag -0.40378300 3.08404400 3.76886600

TS14 C -1.22755400 0.40139100 -0.43798100 C -0.07921100 0.88408000 -0.13431000 Au -3.17610300 -0.07821900 -0.32570200 P -5.46538000 -0.49037900 -0.00426000 C -6.34318700 0.99330700 0.63068500 H -6.27846400 1.79709900 -0.10724300 H -7.39554800 0.76819200 0.82784600 H -5.86167800 1.33322700 1.55089100 C -5.81287300 -1.80585800 1.23131400 H -6.89086600 -1.93185600 1.36916100 H -5.37950400 -2.75098000 0.89475800 H -5.35717300 -1.53605700 2.18720300 C -6.39435800 -0.99806900 -1.50714900 H -7.45383800 -1.14650700 -1.27773300 H -6.29635800 -0.22729800 -2.27549000 H -5.97484700 -1.92821800 -1.89848000 C -2.62581100 5.81525300 0.87872400 C -2.70332700 5.30930600 2.17644500 C -2.13749100 4.06529800 2.48510100 C -1.52975900 3.36842400 1.44713100

Page 80: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S80

C -1.44355100 3.83347700 0.14329800 C -2.00082700 5.08598700 -0.13310100 H -3.05768200 6.78642900 0.65941000 H -3.19286900 5.88081800 2.95470400 H -0.96864700 3.25672700 -0.64029500 H -1.94025400 5.48010800 -1.14248900 C -2.18298400 3.40040300 3.86774000 C -1.75200000 4.39323700 4.98643900 C -3.62430100 2.86692800 4.12801300 O -1.29853200 2.33455800 3.94605500 I -0.73705900 1.47793200 2.07620500 F -1.61761300 3.76747500 6.15824800 F -0.57593700 4.95384600 4.66467800 F -2.65687700 5.38643600 5.15143900 F -3.91962600 1.92554900 3.18848100 F -4.56063200 3.82846500 4.03186800 F -3.73697000 2.28819900 5.32575700 C 1.30244200 1.10869800 -0.54295400 C 1.88100400 0.25491900 -1.50348600 C 2.07355100 2.15454200 -0.00616600 C 3.19719000 0.45511900 -1.91238400 H 1.28466400 -0.54296900 -1.92916300 C 3.38723500 2.35053100 -0.42651200 H 1.64648300 2.82089200 0.73593200 C 3.95446500 1.50099100 -1.37790000 H 3.63327500 -0.20999000 -2.65180500 H 3.96821200 3.16522500 -0.00568900 H 4.98073800 1.65085700 -1.69878300 C -2.84379500 3.78447300 -4.12785500 C -2.70418500 2.44432600 -3.78078200 C -1.42964100 1.87742600 -3.56324300 C -0.29189200 2.69959500 -3.71821000 C -0.42251500 4.04206200 -4.06217100 C -1.69816000 4.56496900 -4.25862300 H -3.81719500 4.23009400 -4.30217200 H -3.58284600 1.81604900 -3.67873800 H 0.69355700 2.27348500 -3.56379500 H 0.44326200 4.68352200 -4.18631800 C -1.29964700 0.50894600 -3.18437600 C -1.19838200 -0.67929000 -2.85336300 F -1.82845400 5.86531600 -4.58106600 C -0.50178500 -4.86714500 -0.30126100 C -0.76239300 -5.91190500 -2.35143600 C -0.30102100 -7.25292500 -0.38364000

Page 81: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S81

H -0.48715400 -3.93281700 0.25205800 H -0.13084200 -8.21721200 0.08683900 C -1.47560500 -5.60687900 -6.48150400 C -1.27301200 -6.86252800 -5.94659100 C -1.03272100 -7.00066400 -4.56048400 C -1.01268800 -5.81515600 -3.77817000 H -1.66019700 -5.46656400 -7.54099800 H -1.29386300 -7.74779200 -6.57593300 C -0.54647700 -7.19213700 -1.77325300 C -0.57923600 -8.36564600 -2.59892500 H -0.41103700 -9.33127600 -2.13151600 C -0.81196700 -8.27388600 -3.93711900 H -0.83289300 -9.16559700 -4.55667500 C -0.27753700 -6.08875200 0.35683300 H -0.08857900 -6.09984100 1.42457300 C -1.43825400 -4.49236400 -5.62129700 H -1.59337300 -3.48887300 -6.00921800 N -0.73751200 -4.77547100 -1.60763800 N -1.21629200 -4.59099100 -4.31722100 Ag -1.06116200 -2.73072800 -2.65299100

TS14' C -2.04223200 -0.25017500 0.63956500 C -0.84296700 0.17909200 0.83261500 Au -3.98339400 -0.68411500 0.72631100 P -6.27299600 -1.16698900 0.98681700 C -7.38062900 0.28667200 0.79713600 H -7.24594800 0.72204200 -0.19605900 H -8.42752600 -0.00358300 0.92663500 H -7.12075100 1.04281500 1.54209100 C -6.68647700 -1.86612100 2.63443500 H -7.75599700 -2.08615500 2.70271900 H -6.11759900 -2.78559700 2.79289700 H -6.41409700 -1.15205200 3.41555400 C -6.89480000 -2.40552800 -0.22029100 H -7.94613600 -2.64023700 -0.02878500 H -6.79106100 -2.00948200 -1.23356400 H -6.29716200 -3.31751100 -0.14605300 C 4.78964800 -0.40011200 1.83341300 C 4.81368900 -0.23657200 0.44907500 C 3.61970800 -0.20360100 -0.28257300 C 2.42377700 -0.29886300 0.42737300 C 2.37120600 -0.48317000 1.80346000 C 3.57655700 -0.53263400 2.50803100

Page 82: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S82

H 5.72461000 -0.43421100 2.38321500 H 5.75919100 -0.15182500 -0.07107400 H 1.43038500 -0.58109300 2.32822300 H 3.55799400 -0.67725200 3.58357800 C 3.54887000 -0.07139500 -1.80954300 C 3.89098100 1.39159600 -2.21536400 C 4.51706200 -1.07541400 -2.50434800 O 2.28160100 -0.37746200 -2.28236900 I 0.68650100 -0.24659000 -0.83441100 F 3.88420000 1.54591000 -3.55550900 F 2.95404400 2.22345000 -1.70871400 F 5.08842000 1.79711800 -1.76275500 F 4.31760400 -2.30939900 -2.01851000 F 5.81523200 -0.75031800 -2.30141400 F 4.31056000 -1.10362900 -3.82583500 C -0.48985100 1.11405800 1.93657900 C 0.20780000 2.30485100 1.67897500 C -0.88191100 0.81619800 3.25399600 C 0.50282400 3.18102500 2.72196700 H 0.52093600 2.54436700 0.66785000 C -0.57951600 1.69779300 4.29142400 H -1.41083300 -0.10960800 3.45632800 C 0.11214300 2.88175800 4.02936000 H 1.04394400 4.09846200 2.51162400 H -0.88440300 1.45654200 5.30530100 H 0.34941300 3.56539800 4.83850200 C -3.79475200 -5.80672300 -0.66972500 C -3.54040500 -4.56917300 -1.25295200 C -2.56365100 -3.70135900 -0.71678500 C -1.84788400 -4.11745000 0.42548000 C -2.10218300 -5.35045800 1.01920900 C -3.07275800 -6.17755300 0.46214200 H -4.53139700 -6.48845400 -1.08095100 H -4.08378600 -4.26770700 -2.14255800 H -1.08988800 -3.46401400 0.84348700 H -1.55714700 -5.68158300 1.89640600 C -2.31083400 -2.43523700 -1.32782100 C -2.11246100 -1.35789500 -1.90488300 F -3.32110500 -7.36929800 1.03199100 C -4.67252200 1.17623600 -4.94870500 C -2.72399800 2.15531900 -5.70999900 C -4.83843500 2.79419000 -6.70783500 H -5.13062000 0.46784100 -4.26304800 H -5.41102000 3.37915000 -7.42210100

Page 83: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S83

C 1.46864200 2.46325000 -5.51502900 C 0.79519200 3.24653800 -6.42730900 C -0.61256800 3.16325300 -6.51437900 C -1.27830400 2.26722100 -5.63645200 H 2.54644300 2.49865600 -5.41478300 H 1.33057000 3.92646700 -7.08410300 C -3.43413500 2.94145500 -6.65809700 C -2.72311900 3.83888600 -7.52169600 H -3.28863200 4.43022600 -8.23571100 C -1.36805500 3.94483800 -7.45116400 H -0.83168500 4.62311400 -8.10812000 C -5.46305000 1.90837800 -5.85395800 H -6.53856600 1.76920900 -5.87148500 C 0.73003400 1.59824900 -4.68674600 H 1.24377800 0.96432900 -3.96977800 N -3.35357600 1.29488400 -4.87508400 N -0.59838800 1.50647500 -4.73779300 Ag -1.79902400 0.11379400 -3.33835000

TS15 C 1.03698200 5.65381100 -1.51252300 C 1.01977700 4.48616700 -0.74988400 C 0.86057000 4.54474800 0.64311100 C 0.73856100 5.80227500 1.22193900 C 0.72254000 6.98095100 0.48486800 C 0.88003100 6.89811700 -0.90140100 H 1.16329700 5.58724100 -2.58858600 H 1.12524500 3.52414200 -1.23382100 H 0.58372900 7.93805900 0.97312000 H 0.87532900 7.80726000 -1.49510900 C 0.77086200 3.30395700 1.55723200 C -0.46259000 2.44960300 1.13600500 C 2.08166500 2.47026200 1.44737900 O 0.60386000 3.64228800 2.87105800 I 0.52074800 5.78648700 3.35623400 C 0.56608400 7.94719800 3.44351000 C -0.33545200 8.70302500 3.96021900 C -0.67905600 10.06862200 4.31541000 C -1.66367400 10.77430300 3.60033900 C -0.00333200 10.70893500 5.37144300 C -1.95061700 12.09754700 3.92387900 H -2.19919900 10.27435700 2.79985000 C -0.29741100 12.03447500 5.68944100 H 0.74856400 10.16194700 5.93114400

Page 84: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S84

C -1.26956300 12.73131800 4.96801600 H -2.70865100 12.63624200 3.36346000 H 0.23017000 12.52108900 6.50441600 H -1.49940500 13.76212300 5.22004300 F -0.64479100 1.40982700 1.95017400 F -1.57887600 3.22816800 1.20488800 F -0.38729800 1.98021900 -0.12804000 F 3.13576000 3.25420300 1.78901800 F 2.31673000 2.01007600 0.19824300 F 2.06852000 1.42172500 2.27270100 C 4.15804600 11.55625200 2.95949700 C 5.48309500 9.73963600 2.38529300 C 6.46785100 11.95667600 2.47355500 H 3.17304600 11.91325000 3.24533500 H 7.32449200 12.61621800 2.36749200 C 5.85489100 5.60544200 1.69207500 C 6.97589300 6.39580000 1.54826300 C 6.88293700 7.78858000 1.77443700 C 5.61548400 8.31197200 2.14739700 H 5.88329400 4.53430100 1.52564100 H 7.93132100 5.96488400 1.26252900 C 6.62551600 10.57293400 2.23737300 C 7.88654600 10.00222200 1.85990300 H 8.74207500 10.66264500 1.75538900 C 8.01021800 8.66514300 1.63805000 H 8.96722600 8.23837900 1.35288100 C 5.23253100 12.45292100 2.83563700 H 5.07811800 13.50941700 3.02450500 C 4.64312600 6.21665300 2.06559000 H 3.74718800 5.61550900 2.18148600 N 4.27405800 10.24807900 2.74277300 N 4.52523400 7.52003200 2.28650400 Ag 2.50236200 8.79100200 2.97414600 P -4.20310600 6.02840200 1.08066800 Au -3.05628000 6.95409000 2.91260900 C -5.64779900 7.01981200 0.52334900 H -6.34736700 7.14580100 1.35342000 H -5.31117400 8.00906800 0.20330100 H -6.15965600 6.52635100 -0.30835200 C -4.88121600 4.35943700 1.44342900 H -5.53360900 4.40689100 2.31866700 H -5.44915700 3.98013900 0.58844200 H -4.05449300 3.67829300 1.65803000 C -3.18423900 5.78502800 -0.42974300

Page 85: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S85

H -3.79634800 5.38930400 -1.24597300 H -2.74062700 6.73500600 -0.73619400 H -2.38292600 5.07848000 -0.20474700 C -2.12781100 9.15911900 9.23698100 C -2.29071600 9.00793300 7.86630900 C -1.80999300 7.85234000 7.20627600 C -1.16202700 6.85033000 7.96613300 C -0.99838200 6.99526800 9.33679900 C -1.48352200 8.14975400 9.95032000 H -2.49163400 10.03530900 9.76197100 H -2.79129500 9.77686200 7.28825700 H -0.79979000 5.95731800 7.46784700 H -0.50909500 6.23637400 9.93705200 C -1.98434900 7.70382200 5.81076600 C -2.12466400 7.62604100 4.57955600 F -1.32497600 8.29318800 11.27307000

21 C -0.34000400 2.08379200 -4.75216000 C -0.53876800 0.70960000 -4.88586700 C -0.53461500 -0.12866300 -3.76140000 C -0.28929000 0.46719200 -2.52957000 C -0.09803800 1.83367200 -2.35996600 C -0.12970200 2.64874800 -3.49432800 H -0.35980600 2.71446200 -5.63540000 H -0.71461900 0.28422200 -5.86588300 H 0.06968500 2.25382500 -1.37550000 H 0.00668900 3.72052900 -3.38713400 C -0.79802100 -1.65507600 -3.81148100 C -2.05495000 -1.95019300 -4.68400600 C 0.45046400 -2.35953600 -4.42700800 O -1.03400100 -2.15926700 -2.56980900 I -0.18217400 -0.86635700 -0.84670100 C 0.54996800 0.63403000 0.54514200 C -0.19926400 0.83898000 1.65695500 C 0.30327800 1.78049700 2.72382900 C 0.51646500 1.33381500 4.03621800 C 0.56338800 3.12416800 2.41503400 C 0.99948800 2.20537900 5.01275900 H 0.31937800 0.29583200 4.28910700 C 1.03538500 3.99892900 3.39601400 H 0.38203000 3.48172500 1.40633400 C 1.25922100 3.54105600 4.69661000 H 1.17279200 1.84112600 6.02109900

Page 86: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S86

H 1.21426900 5.04104700 3.14623000 H 1.62358000 4.22140400 5.46051500 F -2.44740900 -3.22491600 -4.55003200 F -3.08636500 -1.16517500 -4.28609000 F -1.86552100 -1.72134000 -6.00216500 F 1.51341000 -2.18017600 -3.59881300 F 0.80562000 -1.86787600 -5.63305500 F 0.26102600 -3.67811400 -4.55939700 P -4.04455600 -2.82362200 -0.22602100 Au -2.79763700 -1.22655100 0.97460800 C -5.30563600 -3.67283800 0.80693500 H -4.81541600 -4.18105900 1.64077900 H -6.00934700 -2.93997700 1.20868000 H -5.85176400 -4.40844600 0.20851000 C -3.01309500 -4.14926700 -0.95418100 H -2.44636800 -4.65052100 -0.16532200 H -3.65429300 -4.88029100 -1.45676000 H -2.32048300 -3.70289500 -1.67667900 C -4.96760700 -2.09023900 -1.62874500 H -5.56544400 -2.85991800 -2.12666900 H -5.62635300 -1.29650600 -1.26860500 H -4.25686600 -1.67398200 -2.34465900 C -5.32320500 1.46351200 4.87437800 C -4.36807000 1.36674400 3.87156400 C -3.43264300 0.30802600 3.87638100 C -3.47923100 -0.65523500 4.90880100 C -4.43284800 -0.56242600 5.91295000 C -5.34019900 0.49644600 5.87891900 H -6.04907800 2.26852500 4.89459300 H -4.33186200 2.10744300 3.08000500 H -2.76148300 -1.46871200 4.91219800 H -4.48661600 -1.28709900 6.71753600 C -2.42936400 0.24031800 2.86876900 C -1.50801300 0.27618900 2.01968200 F -6.26068500 0.58611400 6.84433300 C 4.67462700 3.24897600 1.58648800 C 5.52019800 2.37221400 -0.38633500 C 6.91219600 3.83336500 0.96019200 H 3.83082000 3.31582500 2.26734400 H 7.85088400 4.35269700 1.13173800 C 4.97309800 -0.03327300 -3.79071700 C 6.18458700 0.60646800 -3.63209100 C 6.39931400 1.42247400 -2.49817100 C 5.33461300 1.54336100 -1.56481000

Page 87: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S87

H 4.77409200 -0.66874100 -4.64673600 H 6.97828300 0.49187400 -4.36503900 C 6.76184800 3.03788200 -0.19734400 C 7.81021700 2.88851900 -1.16560600 H 8.74835100 3.40869600 -0.99645700 C 7.63582800 2.11336400 -2.27070300 H 8.43281600 2.00340700 -3.00024400 C 5.86842300 3.94086100 1.85586700 H 5.95186300 4.54309900 2.75378900 C 3.97885300 0.14922300 -2.81011400 H 3.01755600 -0.34534600 -2.91227500 N 4.50368100 2.49116900 0.50626300 N 4.15027700 0.90929300 -1.73562200 Ag 2.51857000 1.34440100 0.13843800

TS16 C -0.29870100 6.89198000 -1.38376500 C -0.34952700 5.66004900 -0.73400400 C 0.31041400 5.44424100 0.48927600 C 1.05018000 6.50678500 1.00295900 C 1.10925600 7.75062600 0.37375300 C 0.41974600 7.94790400 -0.82273200 H -0.81208100 7.02043200 -2.33211700 H -0.89665300 4.84351300 -1.18562300 H 1.68125700 8.56018700 0.81431000 H 0.46110000 8.91475900 -1.31611800 C 0.25762400 4.08186900 1.25283500 C -1.23835800 3.68398800 1.48577800 C 0.94917600 2.99657000 0.36272400 O 0.85467100 4.12347600 2.45302800 I 2.27749900 6.20935800 2.74567100 C 1.66331700 9.32858600 3.57292600 C 0.45541100 9.24339800 4.12296700 C -0.18607900 10.58657600 4.35963500 C -0.72644900 10.89224600 5.61941500 C -0.22612600 11.54629600 3.33688100 C -1.30764600 12.13801500 5.84438800 H -0.68859500 10.15509300 6.41588200 C -0.79958200 12.79680300 3.57333900 H 0.17982400 11.30151100 2.36111400 C -1.34148200 13.09431300 4.82413000 H -1.72888200 12.36685700 6.81871800 H -0.82771600 13.53462000 2.77725000 H -1.79131300 14.06561900 5.00566300

Page 88: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S88

F -1.34550000 2.53325500 2.15542600 F -1.85260700 4.64409500 2.24861500 F -2.00049200 3.56796600 0.36666200 F 2.21341400 3.37897500 0.09716800 F 0.32809100 2.79958500 -0.83041100 F 0.99463800 1.81209500 0.98563600 P -4.13099600 7.17990100 2.27852600 Au -2.18152700 7.53185100 3.50397800 C -5.32372100 8.57127800 2.37303600 H -5.59170100 8.75503600 3.41628900 H -4.86547900 9.47700300 1.96837800 H -6.22823100 8.33880800 1.80298500 C -5.03413800 5.69659200 2.86906900 H -5.31853100 5.82674400 3.91591000 H -5.93211700 5.53327300 2.26555900 H -4.37318400 4.83135700 2.78647100 C -3.83453200 6.88858900 0.49430400 H -4.78738400 6.76803600 -0.03018800 H -3.28407600 7.72885400 0.06577400 H -3.23569400 5.98374300 0.37742500 C -1.36227000 4.70536000 7.95049300 C -1.16768300 5.86452500 7.21544900 C -0.66257300 5.79221000 5.89570700 C -0.36654800 4.53509000 5.31407900 C -0.57070400 3.37716500 6.05341700 C -1.05948800 3.47894700 7.35458600 H -1.74084500 4.72850600 8.96607300 H -1.39712900 6.83141800 7.65118200 H 0.00656200 4.46489500 4.29090700 H -0.35547300 2.40150700 5.63210900 C -0.44371700 6.98983400 5.16518400 C -0.24698900 8.04798500 4.53774800 F -1.25133300 2.36160100 8.06412500 C 5.87825900 9.27877800 5.34932100 C 6.76413200 9.26566900 3.21417700 C 8.24837800 9.54001200 5.11056400 H 4.98880000 9.20996400 5.96989200 H 9.24420200 9.67604600 5.52271200 C 6.15785000 8.93317200 -0.93753800 C 7.44629800 9.10328400 -0.47422600 C 7.67948200 9.22401100 0.91351000 C 6.55559700 9.16549000 1.78126800 H 5.94441000 8.83051400 -1.99564200 H 8.28615700 9.14204900 -1.16203800

Page 89: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S89

C 8.08386600 9.44199000 3.71070000 C 9.18991500 9.50878000 2.79941600 H 10.18824800 9.64339200 3.20489500 C 8.99591100 9.39999200 1.45672200 H 9.83638800 9.44487800 0.77067800 C 7.14456000 9.46067100 5.93470100 H 7.23669000 9.53255100 7.01284200 C 5.10656300 8.89489000 -0.00591000 H 4.08207300 8.75741700 -0.33922300 N 5.69164200 9.18189200 4.03852300 N 5.29261500 9.01278900 1.30587800 Ag 3.56190300 8.91634500 2.85953300

22 C -1.25325000 -0.21398000 -4.30822800 C -1.29114600 -1.45234900 -3.66997000 C -0.57260500 -1.69392500 -2.48534400 C 0.21301800 -0.65064100 -1.99998100 C 0.26094100 0.59810900 -2.61929600 C -0.48763700 0.82240900 -3.77452800 H -1.81298300 -0.06571700 -5.22698300 H -1.87472800 -2.25457900 -4.10107800 H 0.87221500 1.39247100 -2.20382300 H -0.45367400 1.79392600 -4.25902200 C -0.61317900 -3.06429000 -1.73527500 C -2.10337600 -3.44365300 -1.44116400 C 0.02312100 -4.14911100 -2.66605400 O 0.03369000 -3.04629300 -0.56043800 I 1.53376900 -0.99341500 -0.33525000 C 0.68163500 2.41561200 0.61676600 C -0.54236700 2.33033100 1.12782100 C -1.29578400 3.61664300 1.30150800 C -2.03423000 3.84507400 2.47360800 C -1.24453000 4.60984400 0.31079800 C -2.71493300 5.04878700 2.64600000 H -2.06928300 3.08274900 3.24610000 C -1.91881600 5.81708300 0.49586500 H -0.69085400 4.42368300 -0.60361400 C -2.65541900 6.03874200 1.66056100 H -3.28762000 5.21733500 3.55308600 H -1.87576300 6.58019700 -0.27528200 H -3.18469600 6.97634400 1.79998900 F -2.19841100 -4.59713800 -0.77519800 F -2.67117100 -2.48008900 -0.64661100

Page 90: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S90

F -2.91563900 -3.54173100 -2.52693300 F 1.28214900 -3.78438200 -2.97696400 F -0.64854800 -4.31923500 -3.83556500 F 0.07280700 -5.34254900 -2.06061800 P -5.04374500 -0.03766800 -0.54621800 Au -3.06967400 0.42482700 0.60147800 C -6.30509400 1.28683000 -0.39691800 H -6.54348700 1.44990100 0.65692900 H -5.91155200 2.21806600 -0.81173500 H -7.21641800 1.00833000 -0.93458100 C -5.84154600 -1.56947300 0.07160800 H -6.09163400 -1.45712100 1.12925000 H -6.75257700 -1.77847600 -0.49724700 H -5.13956500 -2.39827600 -0.04073300 C -4.80266700 -0.30541100 -2.34256100 H -5.76715500 -0.48400500 -2.82787200 H -4.32489700 0.56914200 -2.78946800 H -4.15476000 -1.17138800 -2.48852100 C -1.77350700 -2.30638900 5.03028200 C -1.69146700 -1.14587400 4.27662500 C -1.31097300 -1.20835800 2.91462700 C -1.02508100 -2.45775300 2.31260000 C -1.11638700 -3.61754200 3.07113600 C -1.48415400 -3.52521800 4.41218200 H -2.05598600 -2.29006400 6.07679600 H -1.91340600 -0.18521800 4.72972000 H -0.74176200 -2.52710400 1.26117000 H -0.90469800 -4.58630600 2.63252800 C -1.20979400 -0.00488900 2.16822200 C -1.13910600 1.07957800 1.55705900 F -1.56789800 -4.64377500 5.14017500 C 4.57928200 1.99194600 2.73648700 C 5.68520000 1.98622600 0.70716000 C 6.96817900 2.17581900 2.75519400 H 3.62733300 1.94290100 3.25866600 H 7.91856300 2.27065500 3.27272000 C 5.51725000 1.75307100 -3.49340200 C 6.75290300 1.87123600 -2.89116100 C 6.83917900 1.95670500 -1.48406700 C 5.62765200 1.91883200 -0.74180000 H 5.41536700 1.67915800 -4.57034600 H 7.66272500 1.89604500 -3.48405800 C 6.94996700 2.10828300 1.34398200 C 8.14843700 2.15401000 0.55683000

Page 91: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S91

H 9.10163600 2.24697700 1.06867100 C 8.09516200 2.07751700 -0.80087800 H 9.00479200 2.10686800 -1.39316300 C 5.78127400 2.11992500 3.45647500 H 5.76068500 2.16999100 4.53959800 C 4.37190500 1.72932700 -2.68003800 H 3.38562000 1.63009800 -3.12376500 N 4.52916400 1.92463900 1.41194100 N 4.41925000 1.81509400 -1.35357500 Ag 2.51250100 1.73903100 -0.01570100

23 C -0.80599200 -2.70576800 -5.22517200 C -0.85562500 -2.81318600 -3.83879500 C -1.22077000 -1.73600000 -3.00892700 C -1.50574300 -0.51015900 -3.64233000 C -1.45279700 -0.39903900 -5.03892600 C -1.11182800 -1.49077400 -5.83276200 H -0.53431200 -3.57164000 -5.82120500 H -0.60949700 -3.76512900 -3.38892800 H -1.68486200 0.55179800 -5.50480600 H -1.09042000 -1.38523700 -6.91340600 C -1.25835700 -1.93132700 -1.46082900 C -1.73973000 -3.37893500 -1.08006300 C 0.20799800 -1.76167700 -0.94346600 O -2.11003200 -1.05055300 -0.88804900 I -1.99747000 1.34690400 -2.69665700 C 1.76862800 0.73006200 1.18056500 C 0.75609300 0.83596300 1.98233200 C 1.60492700 1.54973100 3.05824600 C 1.70462400 2.95280400 3.05411400 C 2.17047700 0.80026700 4.10538000 C 2.32954900 3.60184600 4.11695100 H 1.28782500 3.51502800 2.22466900 C 2.78940200 1.45814400 5.16485100 H 2.10736600 -0.28283600 4.08244800 C 2.86788000 2.85544800 5.17050300 H 2.40425600 4.68472000 4.12167300 H 3.21639800 0.88546200 5.98202000 H 3.35714900 3.36390300 5.99587000 F -1.99484500 -3.45981000 0.24759700 F -2.89012200 -3.67254800 -1.71689700 F -0.85437300 -4.36906800 -1.34727500 F 0.58455800 -0.46296100 -1.09170900

Page 92: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S92

F 1.11607000 -2.50724700 -1.60770300 F 0.33963000 -2.05845200 0.36717900 C 6.55273100 1.33717600 0.58524100 C 6.16989700 0.69871900 -1.60804700 C 8.42355400 1.25364500 -0.91017000 H 6.13262100 1.52591500 1.56883600 H 9.48121900 1.37068100 -1.12844200 C 3.44942700 -0.51915800 -4.57057800 C 4.77817000 -0.39184400 -4.91756600 C 5.71905400 0.01554800 -3.94401500 C 5.23740500 0.27583000 -2.63460800 H 2.69938800 -0.82956800 -5.28954300 H 5.11392400 -0.59973900 -5.92957100 C 7.54460100 0.84020800 -1.93609500 C 7.99231200 0.56547300 -3.27131200 H 9.04813300 0.68021900 -3.49720500 C 7.11554900 0.16997700 -4.23501900 H 7.46016400 -0.03581600 -5.24402000 C 7.92945800 1.50326400 0.35394900 H 8.57765800 1.82168100 1.16276400 C 3.06390500 -0.24040100 -3.24605600 H 2.02879600 -0.33272500 -2.94037700 N 5.70026500 0.94927300 -0.35866700 N 3.92724400 0.14251700 -2.31066600 Ag 3.40356500 0.64096200 -0.06585000 P -4.62190400 -1.01538000 0.91877800 Au -2.27373400 -0.36832000 1.18471300 C -5.84113100 0.06251000 1.78225800 H -5.62408200 0.09905200 2.85236300 H -5.76710900 1.07805700 1.38411700 H -6.86132100 -0.30433800 1.63323000 C -4.99843800 -2.71437400 1.51776400 H -4.81394600 -2.78300400 2.59306400 H -6.04225500 -2.97412100 1.31601000 H -4.34052200 -3.42105000 1.00883100 C -5.16881900 -1.01089900 -0.83100300 H -6.20589200 -1.35162900 -0.90651800 H -5.08025000 -0.00076100 -1.23723400 H -4.50486400 -1.65888100 -1.40235200 C -3.84853200 0.47401700 5.98133100 C -3.27871900 0.13684300 4.75854100 C -2.25030600 0.91890400 4.20029800 C -1.80862100 2.06223600 4.89811800 C -2.37971200 2.41358700 6.11602300

Page 93: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S93

C -3.39154000 1.61266100 6.64027900 H -4.63274900 -0.12523100 6.43043400 H -3.60970700 -0.75287400 4.23330500 H -1.01983400 2.67507700 4.47522400 H -2.05763300 3.29336100 6.66201200 C -1.63179500 0.56278200 2.94687200 C -0.62323200 0.54118600 2.15097000 F -3.94278900 1.94890600 7.81547100

TS17 C -0.22996500 5.45627400 -1.82848300 C -0.19295700 5.37237400 -0.44023300 C -0.57230100 6.44202100 0.39252200 C -0.96158200 7.63810600 -0.24238500 C -0.99546000 7.72599200 -1.64103200 C -0.64001800 6.63985800 -2.43607400 H 0.05825300 4.59679800 -2.42593100 H 0.13488800 4.44507600 0.00888500 H -1.30568800 8.65408200 -2.10731500 H -0.68560500 6.72618300 -3.51762800 C -0.52022500 6.27159400 1.94216000 C -0.87494500 4.80042200 2.36825800 C 0.95233800 6.55533200 2.39003100 O -1.41316600 7.09764600 2.53747600 I -1.49658900 9.48370200 0.70239600 C 2.51595700 9.04655200 4.72537400 C 1.37760700 9.00658800 5.30041800 C 2.39678800 9.81265800 6.30684600 C 2.33754600 11.22268500 6.32500200 C 2.90428400 9.11420700 7.42299000 C 2.78626900 11.91980100 7.44206900 H 1.94974600 11.74668100 5.45729300 C 3.34528400 9.81900900 8.53736600 H 2.94406000 8.03001200 7.39544300 C 3.28864600 11.21840400 8.54517700 H 2.75071700 13.00452200 7.45645000 H 3.73516400 9.28560100 9.39840900 H 3.63968100 11.76535400 9.41516000 F -1.06265300 4.72725200 3.70816300 F -2.03048300 4.40964600 1.79381900 F 0.06663900 3.87250400 2.07536400 F 1.23417400 7.87099700 2.22128300 F 1.87589300 5.86285600 1.69011300 F 1.15940200 6.27442300 3.69652700

Page 94: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S94

C 7.39683100 8.97907600 4.13889900 C 6.95443500 8.58033700 1.90251500 C 9.25612600 8.72473500 2.64947800 H 6.99523600 9.15251900 5.13330300 H 10.32245500 8.69373500 2.44435000 C 4.13123100 8.00771700 -1.15994400 C 5.46975300 7.96225200 -1.48880200 C 6.44356100 8.15116700 -0.48169100 C 5.98403500 8.38462300 0.84131100 H 3.35700400 7.86269400 -1.90518200 H 5.78836100 7.78142700 -2.51152000 C 8.33999700 8.53245600 1.59132100 C 8.76265400 8.29497900 0.24099200 H 9.82724700 8.26351200 0.02949000 C 7.85173500 8.11220600 -0.75402800 H 8.17672800 7.93219100 -1.77444200 C 8.78661200 8.94846900 3.92761600 H 9.46333200 9.09891800 4.76145900 C 3.76954300 8.24375600 0.17950100 H 2.72696800 8.27749300 0.47316000 N 6.50967500 8.80255700 3.16518800 N 4.66338000 8.42808600 1.14580600 Ag 4.15008700 8.83427100 3.42570000 P -3.89115400 6.95577100 4.38229600 Au -1.58929200 7.73582900 4.61548700 C -5.16051500 7.94773300 5.27370300 H -4.93570900 7.97987900 6.34222400 H -5.14864000 8.97177300 4.89118300 H -6.15888200 7.52403100 5.12752000 C -4.13464400 5.23193800 4.97526700 H -3.90785800 5.16864800 6.04273300 H -5.16511900 4.90414700 4.80704900 H -3.44939300 4.57432600 4.43702200 C -4.45483400 6.93889200 2.63901800 H -5.47900000 6.55921600 2.57326900 H -4.40590100 7.95086500 2.23062600 H -3.77154300 6.31522300 2.06339200 C -3.10526600 8.58975500 9.45605400 C -2.56028400 8.25457200 8.22142800 C -1.56256200 9.05263800 7.63146200 C -1.12609700 10.20982900 8.30974500 C -1.67176600 10.55835400 9.53991300 C -2.65389300 9.74156800 10.09556900 H -3.86589000 7.97872300 9.92919400

Page 95: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S95

H -2.88697000 7.35432300 7.71168400 H -0.36181400 10.83563800 7.86126000 H -1.35360600 11.44833200 10.07150300 C -0.96763000 8.70095000 6.36584800 C 0.03768400 8.71836100 5.56468200 F -3.18080900 10.07529900 11.28251400

24 C 1.97006100 -4.97421500 -2.53895000 C 1.28526400 -4.44705900 -1.44926400 C 0.50345200 -3.27697700 -1.53436200 C 0.41391400 -2.67483000 -2.80492100 C 1.09902000 -3.20397900 -3.90722100 C 1.88161200 -4.34733400 -3.77881700 H 2.55885100 -5.87777700 -2.41534300 H 1.35462300 -4.96645100 -0.50408700 H 1.01076900 -2.71944700 -4.87261100 H 2.40301400 -4.74348400 -4.64476400 C -0.23956500 -2.76351200 -0.26126900 C -1.57197100 -3.57966200 -0.14946300 C 0.59502000 -3.05792500 1.04239800 O -0.49870800 -1.42070700 -0.28747300 I -0.74196000 -0.94729300 -3.33457300 C 1.80398300 0.71228100 2.44559600 C 0.58584700 0.77685800 2.36928600 C 3.21516300 0.67052600 2.62070000 C 3.94326800 1.86596400 2.79537200 C 3.89276000 -0.56576300 2.65753700 C 5.31899900 1.82009000 3.00127400 H 3.41893000 2.81593800 2.77894900 C 5.26816200 -0.59717500 2.86876600 H 3.33013700 -1.48196600 2.52034200 C 5.98378900 0.59111800 3.04063600 H 5.87264900 2.74345600 3.14121700 H 5.78338200 -1.55220500 2.90707600 H 7.05560900 0.55964200 3.21136100 F -2.20022100 -3.36584600 1.03413000 F -2.43279100 -3.20444600 -1.12211400 F -1.39059400 -4.90432800 -0.26190900 F 1.88024500 -2.63715700 0.87953000 F 0.64723400 -4.35812100 1.40852400 F 0.09686100 -2.38621100 2.09104800 C 4.33757000 -1.27975300 -1.17579200 C 4.15041300 0.97116300 -1.67955000

Page 96: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S96

C 6.28393900 -0.14026400 -1.98523800 H 3.84178000 -2.17824200 -0.82067600 H 7.33022500 -0.11764300 -2.27686600 C 1.77319700 4.44116200 -1.90953700 C 3.09705100 4.52561600 -2.28835700 C 3.91865400 3.37867600 -2.21932400 C 3.33062200 2.16986700 -1.75501700 H 1.11522800 5.30221400 -1.95256400 H 3.51815300 5.46278600 -2.64133800 C 5.51574100 1.04283100 -2.06749500 C 6.06861600 2.28438800 -2.52681100 H 7.11462200 2.30956300 -2.81779000 C 5.30157300 3.40593900 -2.60044600 H 5.72320100 4.34318700 -2.95132200 C 5.69678400 -1.30577900 -1.53885100 H 6.25816000 -2.23080000 -1.46549400 C 1.28053500 3.20265600 -1.46139200 H 0.24246300 3.10180300 -1.15683600 N 3.59147800 -0.18364800 -1.24430100 N 2.02700600 2.10660200 -1.38478000 Ag 1.24478100 -0.05902500 -0.71630000 P -4.39256900 -0.61465500 -0.01134400 Au -2.22898900 -0.22175200 0.91832100 C -5.57171700 0.73325400 0.41664600 H -5.63842700 0.83772500 1.50202500 H -5.21151500 1.67834100 0.00213000 H -6.56555000 0.52008600 0.01096700 C -5.21714300 -2.13991600 0.59882100 H -5.29873500 -2.10215100 1.68797100 H -6.21757700 -2.23127600 0.16505000 H -4.61745200 -3.00847400 0.32678100 C -4.50674100 -0.71906200 -1.84145600 H -5.54342100 -0.89341300 -2.14596600 H -4.15622400 0.21788100 -2.28105900 H -3.87314200 -1.52879100 -2.20408900 C -5.05365000 1.71003900 4.70018700 C -4.02846700 1.07501400 4.00842900 C -3.03281700 1.82821200 3.35365000 C -3.08988300 3.23605700 3.40312300 C -4.11446100 3.87649900 4.09189100 C -5.08150700 3.10329600 4.72941300 H -5.82168700 1.14876300 5.22069200 H -3.98061700 -0.00883600 3.98253200 H -2.32425300 3.82031100 2.90382100

Page 97: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S97

H -4.17389300 4.95789300 4.14422200 C -1.94452400 1.18567700 2.67190800 C -0.77808300 0.85991900 2.33619100 F -6.07148100 3.71750000 5.39105300

TS15' C -4.85361700 0.13336200 2.41190200 C -5.33528600 -0.23736300 1.15613700 C -4.45825700 -0.70448600 0.16778900 C -3.10522300 -0.74612300 0.48146900 C -2.59466500 -0.39512700 1.72494200 C -3.49141200 0.04942300 2.70086800 H -5.54983500 0.47848700 3.16978000 H -6.39526100 -0.18071500 0.94406600 H -1.53469400 -0.47396100 1.93508600 H -3.12077600 0.31730700 3.68567700 C -4.88498600 -1.15980900 -1.24231300 C -6.08405500 -2.15051500 -1.15664600 C -5.27578100 0.09603800 -2.07815900 O -3.87253700 -1.82812600 -1.88527600 I -1.85628700 -1.43872800 -1.11147000 C -0.00519900 -0.67641300 -0.06695600 C 0.83868300 -1.62846700 0.16044800 C 1.05329700 -3.06624000 0.19301400 C 1.69029300 -3.73063900 -0.87094600 C 0.56508100 -3.81980300 1.27795900 C 1.82631600 -5.11635200 -0.85393000 H 2.06933700 -3.15151000 -1.70753800 C 0.70680900 -5.20582300 1.28963500 H 0.06678100 -3.31215000 2.09727800 C 1.33796100 -5.85633100 0.22656200 H 2.30904700 -5.62212700 -1.68463700 H 0.31805800 -5.77971300 2.12524100 H 1.44501600 -6.93663600 0.23744700 F -6.35046500 -2.68965600 -2.34958100 F -5.79248500 -3.14246200 -0.29871200 F -7.21901600 -1.54883700 -0.72010900 F -4.18066300 0.89553500 -2.21408800 F -6.23497600 0.84507900 -1.49432200 F -5.69075600 -0.22533300 -3.30590900 C -2.46602500 3.51331800 -0.72541500 C -0.59578300 4.62124400 0.07033400 C -2.54765200 5.90585500 -0.57389700 H -2.93299200 2.56659300 -0.97838700

Page 98: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S98

H -3.05810400 6.85704700 -0.69574500 C 3.34409800 4.43785700 1.53666000 C 2.74976500 5.67713300 1.41025100 C 1.42768400 5.77327500 0.92052100 C 0.76340600 4.56396400 0.57914200 H 4.35671600 4.33149300 1.91037700 H 3.28470900 6.58272300 1.68247600 C -1.22622800 5.88579900 -0.07273300 C -0.52077300 7.08304300 0.28551300 H -1.02690900 8.03657200 0.16730600 C 0.75320200 7.02982400 0.76257500 H 1.28160200 7.93951100 1.03192700 C -3.16997700 4.71946400 -0.90182900 H -4.18216300 4.69766300 -1.29029000 C 2.60715900 3.29574000 1.17214100 H 3.04075600 2.30233800 1.25679300 N -1.22292800 3.46365600 -0.25596900 N 1.36221100 3.35511400 0.71201700 Ag 0.02062600 1.44920200 0.07835700 P 4.96757500 -0.30363900 -3.04553100 Au 3.72381100 -0.58761200 -1.07046500 C 3.99973600 -0.52616500 -4.59341200 H 3.57216000 -1.53156200 -4.61799100 H 3.18110400 0.19715900 -4.62067000 H 4.63642000 -0.38483900 -5.47198000 C 6.37100600 -1.48069100 -3.20009000 H 5.99344200 -2.50613000 -3.18322600 H 6.91803500 -1.31322100 -4.13273700 H 7.05127600 -1.35134900 -2.35458200 C 5.73644400 1.35774400 -3.21872100 H 6.30599700 1.42515400 -4.15048200 H 4.95713800 2.12384400 -3.21696700 H 6.40518100 1.54180300 -2.37417300 C 2.24638000 -2.07915500 5.38439600 C 2.53425500 -2.02798600 4.02725100 C 2.21026600 -0.88047500 3.26442200 C 1.59197600 0.21806000 3.90748700 C 1.30459500 0.17253500 5.26500600 C 1.63592900 -0.97710200 5.98183200 H 2.48766800 -2.94777000 5.98684000 H 3.01139600 -2.87008200 3.53796800 H 1.34887700 1.10267500 3.32827100 H 0.83607600 1.00443500 5.77911800 C 2.49872100 -0.83880900 1.88194900

Page 99: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S99

C 2.70066900 -0.84452500 0.65441400 F 1.36036600 -1.02159700 7.29123000

TS18 C 5.16449900 -1.74232500 0.76259000 C 4.47213500 -2.76055500 0.10698700 C 3.14048500 -2.57300300 -0.28824400 C 2.56517200 -1.33800000 -0.01361500 C 3.22584100 -0.29959800 0.62519600 C 4.54791500 -0.51817100 1.02326300 H 6.19309400 -1.90780700 1.06687100 H 4.96098800 -3.70478400 -0.09573400 H 2.73586000 0.64975100 0.80594400 H 5.08899300 0.27518000 1.52924000 C 2.28658500 -3.62574200 -1.02072100 C 2.80337600 -3.77788800 -2.48269400 C 2.33882500 -4.99138900 -0.27796100 O 0.96076900 -3.25394100 -1.05677500 I 0.55448100 -1.14587200 -0.73771800 C 0.38813100 0.90340100 -0.06976300 C -0.12589000 1.56880900 0.89931000 C -0.42526400 2.94847600 1.27017500 C -0.18448100 3.40684200 2.57953700 C -0.97249600 3.84216800 0.32960700 C -0.45856300 4.72713700 2.93190000 H 0.23644300 2.72348600 3.31234800 C -1.26463700 5.15580700 0.69470300 H -1.16086100 3.49864500 -0.68091800 C -1.00455900 5.60514400 1.99219100 H -0.24939200 5.07010100 3.94092600 H -1.69360000 5.83258700 -0.03849900 H -1.22978500 6.63034700 2.26976900 F 2.10899900 -4.70272600 -3.15742600 F 2.65356800 -2.59653200 -3.12190100 F 4.10849000 -4.11040500 -2.54218000 F 2.02422600 -4.81104900 1.02961000 F 3.56142300 -5.56176500 -0.31998100 F 1.46388900 -5.86095900 -0.78813100 P -1.86379400 0.87118200 -5.05196800 Au -0.38702100 1.46679900 -3.32135300 C -1.27352200 -0.54878000 -6.05913300 H -0.30122800 -0.30618900 -6.49503100 H -1.15248700 -1.42715200 -5.42034700 H -1.98232400 -0.77833600 -6.86043200

Page 100: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S100

C -2.13991400 2.22175900 -6.26803800 H -1.18321100 2.52111200 -6.70324800 H -2.81369400 1.89555700 -7.06600200 H -2.57267600 3.08785400 -5.76118100 C -3.55232700 0.38556000 -4.50759900 H -4.18050500 0.13507800 -5.36777400 H -3.48810700 -0.48133200 -3.84536700 H -4.00950600 1.20978000 -3.95455500 C 4.03039100 5.13989300 0.30380900 C 2.92403700 4.46843200 -0.20073100 C 3.08212500 3.27515300 -0.94257800 C 4.38632200 2.77705800 -1.16569500 C 5.49652400 3.44723900 -0.66672900 C 5.29999500 4.61857400 0.06214600 H 3.92920800 6.05639600 0.87441700 H 1.92590300 4.85572500 -0.02758600 H 4.51400500 1.86578300 -1.73985600 H 6.50468600 3.08514900 -0.83535700 C 1.95261100 2.60019300 -1.47056800 C 0.95491000 2.01856100 -1.91933100 F 6.36957100 5.26551300 0.54894900 C -0.28736700 -3.28032000 2.65687700 C -1.48492200 -2.33844600 4.40336700 C -1.03377500 -4.72270300 4.41782200 H 0.22357200 -3.14123000 1.71016600 H -1.11811600 -5.69877500 4.88725500 C -3.19464800 1.06739600 6.19452700 C -3.34245300 -0.15019900 6.82644900 C -2.77753300 -1.31139800 6.25229100 C -2.07275500 -1.16486300 5.02675200 H -3.61687600 1.97606200 6.60931800 H -3.88815500 -0.23024800 7.76237600 C -1.62116800 -3.59939500 5.04363300 C -2.33646100 -3.70182300 6.28313100 H -2.42476800 -4.67860200 6.74925200 C -2.89397500 -2.60395100 6.86304000 H -3.43612100 -2.68764500 7.80017600 C -0.36351800 -4.56541300 3.22340200 H 0.10666700 -5.39709800 2.71214300 C -2.47564500 1.11579700 4.98653600 H -2.33353700 2.05814900 4.46393200 N -0.82425300 -2.20364800 3.22403300 N -1.93444200 0.04153100 4.42325500 Ag -0.69085800 -0.01442600 2.36268500

Page 101: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S101

TS18' C 4.20710500 1.99903400 2.79475200 C 4.02470800 1.71853300 1.44038100 C 3.10953800 2.45753900 0.67742500 C 2.39605100 3.45720300 1.32673100 C 2.53541300 3.74562100 2.67771100 C 3.46238500 3.00241900 3.41539100 H 4.93457900 1.42939400 3.36449600 H 4.59968100 0.93293300 0.96703100 H 1.94932600 4.52911500 3.14303100 H 3.60347100 3.22153400 4.46944600 C 2.80253200 2.20030600 -0.80996600 C 4.11381000 2.05668300 -1.63667400 C 1.94951900 0.89733700 -0.91135300 O 2.09109100 3.23537700 -1.36349800 I 1.07154600 4.55516000 0.03231000 C 0.31898300 5.73362200 1.68670700 C 0.57115200 6.78462600 2.37792400 C 1.66591900 7.77249600 2.36780300 C 2.98353900 7.41501300 2.02124500 C 1.40399300 9.11781200 2.69192900 C 3.99848200 8.37020200 2.00373500 H 3.21499800 6.38457500 1.77510600 C 2.41679100 10.07501500 2.65028500 H 0.39022900 9.40842100 2.95335600 C 3.72009500 9.70332700 2.31271500 H 5.00867700 8.07246100 1.73877000 H 2.18816700 11.11119100 2.88240200 H 4.51171000 10.44591100 2.28930800 F 3.85507300 2.00830800 -2.94528900 F 4.91703100 3.10668900 -1.39940900 F 4.79879400 0.93033700 -1.31426700 F 0.76455800 1.09751400 -0.26443900 F 2.53170800 -0.16884800 -0.31618600 F 1.67074300 0.56809300 -2.17223000 P -0.88742100 0.42581800 2.95800300 Au -1.18055400 2.72563100 2.53484600 C 0.85315300 -0.14054000 3.11378200 H 1.37002700 0.02499500 2.16668800 H 1.36381300 0.42816400 3.89390700 H 0.88483900 -1.20657100 3.35876600 C -1.58111600 -0.61018900 1.60830000 H -1.06020000 -0.37095100 0.67847300

Page 102: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S102

H -1.45443100 -1.67346400 1.83305200 H -2.64421500 -0.39136700 1.48116900 C -1.71367400 -0.17395200 4.48828400 H -1.58198700 -1.25438400 4.60023600 H -1.28788900 0.33195900 5.35846400 H -2.78135700 0.05480200 4.44235200 C -4.22717500 8.69925400 1.25705900 C -3.52937600 7.62660400 1.79866100 C -2.99294200 6.61724100 0.96372600 C -3.18895100 6.71428000 -0.43562000 C -3.88555200 7.78202800 -0.98112600 C -4.39294400 8.76025100 -0.12473800 H -4.64860200 9.48028800 1.88007500 H -3.40567900 7.54846200 2.87365500 H -2.78892000 5.94009300 -1.08171100 H -4.04511000 7.87316700 -2.04969300 C -2.26551800 5.53850900 1.51145300 C -1.54937200 4.64089800 1.99356400 F -5.06890000 9.78985200 -0.64944400 C -3.44975300 5.52157000 5.35893500 C -2.52483600 7.06396400 6.82229600 C -4.52187000 5.85213600 7.47662800 H -3.38460300 5.03222400 4.39084200 H -5.30483400 5.63713600 8.19841000 C 0.47742600 9.88785700 7.66703300 C -0.48875900 9.65459700 8.62375800 C -1.51176500 8.71280400 8.36962500 C -1.49082300 8.04139100 7.11744900 H 1.27561400 10.60344300 7.83139800 H -0.47538900 10.18520700 9.57161000 C -3.53062400 6.80798900 7.79343100 C -3.51571800 7.51064200 9.04446600 H -4.29686500 7.29618000 9.76764500 C -2.54607900 8.42502300 9.32125400 H -2.53938700 8.95367600 10.26981600 C -4.48389400 5.20569600 6.25821300 H -5.23064500 4.46860200 5.98411900 C 0.41302200 9.17467000 6.45498000 H 1.15445800 9.33650800 5.67654500 N -2.50547000 6.41872500 5.62793500 N -0.53505300 8.28433900 6.18883900 Ag -0.75752700 6.93163800 4.13557400

TS19

Page 103: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S103

C -0.01198800 0.19826200 0.23809700 C -0.89218400 0.00103000 1.18136500 Au 3.21264500 0.45650200 1.34333700 P 5.05384600 -0.89769700 1.90494700 C 5.76322100 -1.86069800 0.50704400 H 6.09605100 -1.17730600 -0.27810300 H 6.61210400 -2.46298000 0.84445800 H 4.99764000 -2.51993600 0.09024600 C 4.67843600 -2.16483400 3.18431700 H 5.56721000 -2.76062600 3.41290600 H 4.33004100 -1.67328000 4.09610400 H 3.88477100 -2.82407100 2.82415500 C 6.48020000 0.03991100 2.58780600 H 7.30245500 -0.63486300 2.84391000 H 6.82727300 0.76793000 1.85028000 H 6.16660800 0.58192900 3.48351400 C -5.39587900 1.10048600 -1.99047200 C -5.52114700 -0.28847300 -1.96066200 C -4.53838200 -1.07760000 -1.34767700 C -3.46614200 -0.41549600 -0.76000800 C -3.31260600 0.96374400 -0.76556600 C -4.29751200 1.72625100 -1.40063500 H -6.16413800 1.69469600 -2.47480000 H -6.37925300 -0.76559700 -2.41666500 H -2.45744900 1.43772700 -0.29941100 H -4.19858500 2.80693500 -1.42523800 C -4.57748500 -2.61364700 -1.25929100 C -5.67821400 -3.04133100 -0.24251100 C -4.85477700 -3.24076900 -2.65591700 O -3.36100100 -3.11846500 -0.84873900 I -2.07798300 -1.72455300 0.22863200 F -5.77222600 -4.37240200 -0.14821600 F -5.35863300 -2.55528200 0.97612400 F -6.89449700 -2.55738500 -0.56725000 F -3.98363400 -2.73487900 -3.56349400 F -6.09944300 -2.97930000 -3.10778000 F -4.69578800 -4.56594600 -2.63774200 C -1.26553400 0.42087600 2.53761900 C -0.27261500 0.64755800 3.50844500 C -2.61454600 0.59333800 2.89604600 C -0.62462900 1.05402300 4.79432500 H 0.76904600 0.50646600 3.24695600 C -2.95940800 1.00635500 4.18122600 H -3.39722400 0.40947000 2.16695400

Page 104: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S104

C -1.96661300 1.23911300 5.13506400 H 0.15267800 1.22159600 5.53410700 H -4.00577000 1.13899800 4.43841500 H -2.23690200 1.55314500 6.13857800 C -1.05605400 5.32005800 -0.92147000 C -0.16469600 4.27276200 -0.71908900 C -0.04900200 3.65720700 0.54725800 C -0.85550600 4.12452000 1.60963100 C -1.74941100 5.17012600 1.41297400 C -1.83532800 5.75197400 0.14983500 H -1.15295800 5.80911800 -1.88448100 H 0.45835700 3.92519300 -1.53648900 H -0.77047000 3.65671500 2.58430800 H -2.37387700 5.54352300 2.21697800 C 0.86479900 2.58971000 0.75117500 C 1.64691300 1.64670700 0.92305400 F -2.69737600 6.76227600 -0.04237000 C 3.20037500 1.19812700 -3.31277800 C 2.04081600 -0.34169200 -4.59872800 C 3.93849800 0.81943000 -5.56151800 H 3.29092800 1.70041500 -2.35334100 H 4.60745000 1.01228900 -6.39551300 C -1.13854100 -3.07168700 -4.94185300 C -0.31544800 -2.88709500 -6.03254000 C 0.76509200 -1.97915600 -5.94696200 C 0.95197900 -1.29418900 -4.71752900 H -1.98807200 -3.74362500 -4.97141900 H -0.48848400 -3.42465300 -6.96060800 C 2.89487300 -0.12082700 -5.71295600 C 2.67583500 -0.83969600 -6.93513200 H 3.34261000 -0.65459000 -7.77195100 C 1.65303600 -1.73139100 -7.04674400 H 1.48931900 -2.27028600 -7.97526400 C 4.09399900 1.48243300 -4.36083500 H 4.88284200 2.21229300 -4.21536500 C -0.87000400 -2.35279500 -3.76133800 H -1.50726400 -2.48363300 -2.89269800 N 2.20994600 0.31840500 -3.42559100 N 0.13999600 -1.49628700 -3.64986700 Ag 0.67681900 -0.17306300 -1.70898900

TS19' C -1.95531100 -0.65602900 0.95488100 C -0.80344600 -0.04658500 0.87828300

Page 105: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S105

Au -1.84792000 -1.17193600 -2.97609800 P -1.25041400 -0.11003000 -4.99731700 C -1.00492500 1.70600000 -4.85195200 H -0.18573700 1.90572100 -4.15787700 H -0.75529000 2.13492600 -5.82730700 H -1.91552800 2.17603500 -4.47287400 C -2.45803300 -0.31809700 -6.36816900 H -2.09960800 0.17420200 -7.27711500 H -2.60131200 -1.38274800 -6.56916700 H -3.42064600 0.11194100 -6.08047700 C 0.34484400 -0.74280100 -5.64654500 H 0.60558800 -0.23815300 -6.58196100 H 1.12657700 -0.56741000 -4.90234700 H 0.26493200 -1.81788600 -5.82663000 C 4.83959000 1.14940400 1.02574600 C 4.63334300 1.09130700 -0.35220400 C 3.40533600 0.65998700 -0.86996100 C 2.40151100 0.33425900 0.04162400 C 2.58416700 0.36692300 1.41819400 C 3.82537700 0.78054300 1.90848900 H 5.80156700 1.47522100 1.40807100 H 5.43149800 1.36325200 -1.03101100 H 1.79457300 0.08452100 2.10171200 H 3.99157400 0.80909600 2.98073700 C 3.09975400 0.52281400 -2.37124200 C 2.88869900 1.93720500 -2.98644600 C 4.24674800 -0.22743500 -3.11019200 O 1.95677200 -0.22329900 -2.58124400 I 0.57261000 -0.28107800 -0.89559000 F 2.63261600 1.87095500 -4.30528900 F 1.81088100 2.51774900 -2.40080800 F 3.93778800 2.75680500 -2.80674200 F 4.52071900 -1.37922500 -2.48076600 F 5.38609600 0.50075500 -3.16572000 F 3.89388000 -0.51357300 -4.37238800 C -0.61725000 1.09066300 1.83249900 C -0.39477300 2.39591300 1.36062800 C -0.68580800 0.86768900 3.21965100 C -0.24065900 3.45002600 2.25848300 H -0.33696000 2.58284500 0.29296900 C -0.53217000 1.92989900 4.11331700 H -0.84371400 -0.14060700 3.58847200 C -0.30962300 3.22285500 3.63627600 H -0.06286900 4.45230500 1.88062700

Page 106: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S106

H -0.57635400 1.74185800 5.18217400 H -0.18103700 4.04703300 4.33116800 C -3.23742400 -6.09275000 1.38297500 C -3.11108000 -5.06741600 0.45163400 C -2.28111400 -3.95342300 0.70784900 C -1.57759300 -3.90197600 1.92860600 C -1.70402000 -4.92199300 2.86729700 C -2.53346000 -6.00197600 2.58115800 H -3.86165100 -6.95910000 1.19336700 H -3.63815200 -5.12811500 -0.49523300 H -0.93014500 -3.05699200 2.13114800 H -1.16558600 -4.89693600 3.80834700 C -2.15757300 -2.93066200 -0.28210400 C -2.12614400 -2.16119000 -1.24859000 F -2.65634500 -6.98795200 3.48496600 C -4.80831500 1.53507500 3.93475100 C -6.45943700 -0.01231700 3.45110700 C -6.94906700 1.79932400 4.98297800 H -3.78347000 1.85825500 3.77292700 H -7.63440000 2.32337700 5.64311500 C -7.63454600 -3.48590800 1.39184500 C -8.55580600 -2.86793200 2.21207200 C -8.19125600 -1.69849500 2.91630800 C -6.87046400 -1.20768400 2.73892000 H -7.88205800 -4.38588200 0.83998600 H -9.55897000 -3.26883600 2.32601800 C -7.38828100 0.63975500 4.30504200 C -8.71499100 0.11395100 4.45343100 H -9.40704700 0.63095100 5.11140300 C -9.09998900 -1.00906100 3.78708300 H -10.10460400 -1.40421700 3.90400100 C -5.65753100 2.24945300 4.80016800 H -5.29040600 3.13498200 5.30720600 C -6.34907800 -2.92713700 1.27714900 H -5.59804200 -3.39185100 0.64590200 N -5.19483100 0.44486900 3.28190300 N -5.97801700 -1.82642000 1.92426800 Ag -3.87708200 -0.83433900 1.72642500

TS3' C -1.78692800 -2.10609400 -1.10393200 C -2.68444500 -2.64298800 -0.43503600 C -3.81233500 -3.10825800 0.32861900 C -4.62156400 -4.16136700 -0.14261000

Page 107: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S107

C -4.13372900 -2.49281100 1.55423300 C -5.72336200 -4.58544200 0.59757400 H -4.38158700 -4.63528400 -1.08977700 C -5.23978200 -2.92077000 2.28489200 H -3.51322700 -1.68072800 1.91915000 C -6.03562900 -3.96690700 1.81136800 H -6.34377600 -5.39419900 0.22325300 H -5.48132400 -2.43614800 3.22586500 H -6.89704300 -4.29704700 2.38370200 P -2.41236600 -0.66508800 -3.96113800 Au -0.60800000 -0.87305100 -2.28903800 C -3.85856800 0.25342000 -3.29916000 H -4.23662500 -0.26092900 -2.41237000 H -3.54945600 1.26121300 -3.00999100 H -4.65412800 0.32202400 -4.04710500 C -3.09370500 -2.26527800 -4.55261800 H -3.43592800 -2.84477800 -3.69213700 H -3.92781400 -2.10664300 -5.24264500 H -2.30899000 -2.83024400 -5.06246500 C -1.90156300 0.24228900 -5.47169300 H -2.75169100 0.41326900 -6.13828200 H -1.46019500 1.19950200 -5.18361700 H -1.13759900 -0.33454100 -5.99908900 C 5.58395300 -0.67747900 0.77331300 C 4.50883200 -0.71082000 -0.10870900 C 3.19052700 -0.49031500 0.34742900 C 2.98548800 -0.22405400 1.71857400 C 4.05677400 -0.18360500 2.60438400 C 5.34085100 -0.41471500 2.11864400 H 6.60204600 -0.83766100 0.43545200 H 4.68157500 -0.89159500 -1.16489400 H 1.97775700 -0.04557300 2.07860400 H 3.91366200 0.02372900 3.65918700 C 2.09544400 -0.52910500 -0.55936500 C 1.17422600 -0.54872800 -1.36947600 F 6.37746800 -0.38211100 2.97381300 C 3.80524600 2.37883900 -6.34746300 C 3.05559700 1.50193100 -5.57194500 C 2.24315400 1.98067700 -4.52046600 C 2.20750300 3.37044600 -4.26995200 C 2.95487700 4.25149900 -5.04282000 C 3.74285500 3.74221300 -6.07162200 H 4.43375000 2.02570300 -7.15759500 H 3.09210300 0.43613900 -5.77232000

Page 108: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S108

H 1.59113900 3.74878200 -3.46121300 H 2.93847200 5.32040600 -4.86077600 C 1.47653200 1.08444200 -3.73080000 C 0.83461100 0.31051200 -3.02604100 F 4.46519500 4.59200100 -6.82123100 C -1.74824400 -6.74655400 1.24146200 C 0.52731600 -6.71796200 0.80651900 C -0.44852900 -8.64851000 1.90191700 H -2.69850500 -6.22420000 1.16946200 H -0.35012500 -9.63272800 2.35103400 C 3.88342600 -4.69051200 -0.72363100 C 4.06701000 -5.94349000 -0.17782400 C 2.95839300 -6.65009300 0.34131200 C 1.68535400 -6.02424500 0.27008100 H 4.71407700 -4.11737400 -1.11946600 H 5.05395500 -6.39547500 -0.13564300 C 0.69824600 -8.00467100 1.38477200 C 2.00099600 -8.60336000 1.43076500 H 2.10314400 -9.58797100 1.87702400 C 3.08621200 -7.95235000 0.92968200 H 4.07119500 -8.40776100 0.96895300 C -1.67529700 -8.02099700 1.83209300 H -2.57332800 -8.48791200 2.22124700 C 2.58558700 -4.14840300 -0.75533200 H 2.40464200 -3.15982400 -1.16675100 N -0.68762900 -6.11738300 0.74628700 N 1.52480400 -4.79320400 -0.27948100 Ag -0.66908600 -3.97151700 -0.28364500

13' C 1.22777800 1.94693800 1.21490800 C 0.80107700 2.88600100 0.55714700 C 0.29269400 3.98693200 -0.18494300 C 0.03111000 3.86306100 -1.56715800 C 0.03709100 5.21925100 0.45457800 C -0.47071100 4.94091100 -2.28872200 H 0.22321200 2.91824400 -2.06502200 C -0.46451300 6.29856700 -0.26368800 H 0.23380300 5.31924300 1.51669800 C -0.71020000 6.14216400 -1.62552200 H -0.68142500 4.86346900 -3.34975100 H -0.66785800 7.25197100 0.21110800 P -1.06722500 -1.77408400 -0.15516100 Au 0.22102900 -0.61262300 -1.74637200

Page 109: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S109

C -1.79532300 -0.69396700 1.13974400 H -0.99230400 -0.19470000 1.68680000 H -2.42164400 0.06794700 0.66915800 H -2.40240600 -1.28088100 1.83555800 C -0.16945400 -3.08164000 0.77434600 H 0.65294800 -2.63141500 1.33516800 H -0.84247800 -3.59107600 1.47076300 H 0.24206200 -3.81227400 0.07347300 C -2.50421600 -2.64310500 -0.90439400 H -3.08887400 -3.15959100 -0.13738200 H -3.14315600 -1.91918200 -1.41650500 H -2.15148000 -3.37128300 -1.63912200 C 3.87046600 -3.18125600 3.60362100 C 3.38511100 -2.13330400 2.82874600 C 2.62235400 -1.09804300 3.41237400 C 2.36258600 -1.14237500 4.79976700 C 2.84727300 -2.18633200 5.57920500 C 3.59387100 -3.19101500 4.96844000 H 4.45861100 -3.98373300 3.17219000 H 3.59734200 -2.10193600 1.76486000 H 1.78026600 -0.34952000 5.25686400 H 2.65771800 -2.23382100 6.64583100 C 2.12652000 -0.02646200 2.61987300 C 1.69887700 0.90493700 1.95220500 F 4.06248500 -4.20103300 5.71793200 C 1.79149400 2.01285200 -7.80060800 C 1.59825000 1.25244200 -6.65086500 C 1.64239300 1.86383700 -5.38087200 C 1.88640300 3.25050700 -5.29318300 C 2.08328000 4.00072200 -6.44863700 C 2.03557800 3.38538400 -7.70284000 H 1.75111000 1.53554500 -8.77483200 H 1.40512600 0.18678300 -6.71979800 H 1.91726500 3.72458600 -4.31724800 H 2.27177000 5.06722200 -6.37286500 C 1.42433500 1.08920900 -4.20220700 C 1.20487100 0.41494600 -3.18816400 C 4.83528500 1.71212700 0.11863900 C 6.14475900 0.14508100 -0.98084600 C 7.12611000 1.48668900 0.78595700 H 3.85862400 2.17516100 0.22165400 H 7.97609600 1.76331300 1.40334600 C 6.49972800 -2.84217500 -3.92578900 C 7.61147100 -2.53146400 -3.17024100

Page 110: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S110

C 7.52367300 -1.53425300 -2.17261700 C 6.26999900 -0.88837100 -1.99514200 H 6.53448600 -3.60096500 -4.69979300 H 8.55647300 -3.04234800 -3.33178700 C 7.27877100 0.47806100 -0.19208900 C 8.52513900 -0.20067300 -0.40327200 H 9.37514900 0.07541600 0.21351600 C 8.64343100 -1.16653500 -1.35490400 H 9.58963500 -1.67561200 -1.51221800 C 5.90387700 2.10565000 0.94413700 H 5.75257500 2.88180200 1.68599500 C 5.30106800 -2.14904000 -3.67570600 H 4.40693700 -2.36835400 -4.25318300 N 4.94989300 0.76762300 -0.81093800 N 5.18731100 -1.20814300 -2.74568800 Ag 3.21699400 0.14801600 -2.26400700 F -1.19372500 7.18275700 -2.32230500 H 2.18710900 3.97470600 -8.60203100

P2 C 0.28411300 -2.25839800 -0.39832300 C -0.37297700 -1.29332300 -0.75728500 C 1.01547700 -3.33210600 0.00102300 C 1.67261600 -4.29713800 0.36001000 C 2.43677600 -5.41920700 0.77893100 C 3.26492900 -5.33901400 1.91889600 C 2.38124300 -6.63429100 0.06319100 C 4.01352700 -6.43582700 2.33188400 H 3.31301500 -4.40847200 2.47425700 C 3.12764200 -7.73437700 0.47155900 H 1.74718500 -6.70378000 -0.81420100 C 3.93258800 -7.61727100 1.60080900 H 4.65414100 -6.38958800 3.20572800 H 3.09525400 -8.67459300 -0.06795300 C -1.13724500 -0.17132000 -1.17618500 C -1.96360000 -0.25086300 -2.31750000 C -1.08361500 1.04304500 -0.45908300 C -2.71230400 0.84588300 -2.73047100 H -2.01022500 -1.18085500 -2.87390500 C -1.83012500 2.14306400 -0.86743200 H -0.45096200 1.11202600 0.41936400 C -2.63326600 2.02661200 -1.99803400 H -3.35155800 0.80013700 -3.60533700 H -1.79919700 3.08272900 -0.32687600

Page 111: Alkynylation of Terminal Alkynes with Alkynyl Hypervalent ...acetylene gold intermediate 14 to the silver(I)-activated alkynyl hypervalent iodine (6) along pathway IV shown in Scheme

S111

F 4.65650000 -8.68133600 1.99906900 F -3.35728100 3.09061100 -2.39628100

14' P 2.21554500 1.00065600 3.64728500 Au 0.31941000 0.82129700 2.27888000 C 1.86030500 1.22714600 5.44094300 H 1.26984800 2.13614100 5.58049700 H 1.27052300 0.38064900 5.80147700 H 2.78426400 1.30077300 6.02315400 C 3.33485000 2.40707600 3.24270500 H 2.78179400 3.34573600 3.32892900 H 4.19979700 2.43180900 3.91296000 H 3.67857000 2.30910900 2.20993300 C 3.32698600 -0.46792600 3.60417200 H 4.19464200 -0.33099100 4.25736800 H 2.76886600 -1.35204300 3.92233500 H 3.66699500 -0.63242500 2.57864200 C -5.17927000 -0.96727300 -1.40619500 C -4.05787000 -0.84020800 -0.59039000 C -3.41856000 0.40736600 -0.43553900 C -3.94346500 1.51908900 -1.12657100 C -5.06526400 1.38443400 -1.94066800 C -5.68890000 0.14251400 -2.08503400 H -5.65814000 -1.93691200 -1.51303400 H -3.66089100 -1.70144700 -0.06234800 H -3.45804700 2.48330600 -1.01342800 H -5.45510900 2.25266300 -2.46517100 C -2.26951900 0.54067100 0.39947800 C -1.28285700 0.65302800 1.11663200 H -6.56389600 0.04041200 -2.72069100