chemical reactions of alkanes and alkenes. 1. structure cyclohexane cyclohexene or
TRANSCRIPT
Chemical Reactions of Alkanes and Alkenes
1. Structurecyclohexane cyclohexene
Or
CH2
CH2
CH2
CH2
CH2
CH2
C
C
C
C
C
C
H
H
H HH
H
H
HH H
H
H
Or
CH2
CH2
CH2
CH2
CH
CH
C
C
C
C
C
C
H
H HH
H
H
HH H
H
Table: 2-7
Cyclohexane Cyclohexene Polarity Non-polar Non-polar
Solubility Insoluble Insoluble H2SO4 None Cloudy
Br2 before Orange Orange Br2 after Orange Colourless KMnO4 Purple Purple KMnO4 Purple Brown
Question 1 - 51. Insoluble because they are non-polar.
Water is polar. Like-dissolves-like.
2. Alkanes: unreactive, Alkenes: most
3. A double bond has both
4. Weaker, projects outward
5. a) addition
b) it was the (acid) catalyst
c) accelerates a reaction without being used up
5 d) Cyclohexene + H2SO4 + H2O
cyclohexanole) Found in water because it has a polar
moiety (it is polar)
f) cyclohexanol (the product / the one to the right)
C
C
C
C
C
C
H
H H
H
H
H H
H
H
H
+C
C
C
C
C
C
H
H HH
HH H
H
H
H
OH
HOH2
catalyst
6 a-d: Cyclohexene + Br2
a) Orange
b) Addition
c)
C
C
C
C
C
C
H
H H
H
H
H H
H
H
H
+ Br BrC
C
C
C
C
C
H
H HH
HH H
H
H
H
Br
Br
d) Bromine was used up (disappeared)
7 : Cyclohexene + KMnO4
C
C
C
C
C
C
H
H H
H
H
H H
H
H
H
+C
C
C
C
C
C
H
H HH
HH H
H
H
H
OH
OHOH2
KMnO4
+ KOH + MnO2
C. Cyclohexene + Br
C
C
C
C
C
C
H
H H
H
H
H H
H
H
H
+ Br BrC
C
C
C
C
C
H
H HH
HH H
H
H
H
Br
Br
Isomers: cis-1,2-dibromocyclohexane
trans-1,2-dibromocyclohexane
E. Cyclohexene + KMnO4
Isomers: cis-1,2-cyclohexanediol
trans-1,2-cyclohexanediol
C
C
C
C
C
C
H
H H
H
H
H H
H
H
H
+C
C
C
C
C
C
H
H HH
HH H
H
H
H
OH
OHOH2
KMnO4
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