1 tetrahedral electronic geometry: ab 3 u species (one lone pair of electrons on a) some examples of...

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1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3 , NF 3 , PH 3 , PCl 3 , AsH 3 These molecules are our first examples of central atoms with lone pairs of electrons. Thus, the electronic and molecular geometries are different. All three substituents are the same but molecule is polar polar. NH 3 and NF 3 are trigonal pyramidal, polar molecules.

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Page 1: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

1

Tetrahedral Electronic Geometry: AB3U Species (One Lone Pair of

Electrons on A)

Some examples of molecules with this geometry are: NH3, NF3, PH3, PCl3, AsH3

These molecules are our first examples of central atoms with lone pairs of electrons.Thus, the electronic and molecular geometries are

different.All three substituents are the same but molecule is polarpolar.

NH3 and NF3 are trigonal pyramidal, polar molecules.

Page 2: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

2

Tetrahedral Electronic Geometry: AB3U Species (One Lone Pair of

Electrons on A)Valence Bond Theory

Page 3: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Page 4: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Page 5: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Molecular and Electronic Geometry

Page 6: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Page 7: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Molecular Geometry

Page 8: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Tetrahedral Electronic Geometry: AB3U Species (One Lone Pair of

Electrons on A)

Polarity

Page 9: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

9

Tetrahedral Electronic Geometry: AB2U2 Species (Two Lone Pairs of Electrons

on A)

Some examples of molecules with this geometry are: H2O, OF2, OCl2, H2S

These molecules are our first examples of central atoms with two lone pairs of electrons.Thus, the electronic and molecular geometries are

different.Both substituents are the same but molecule is polarpolar.

Molecules are angular, bent, or V-shaped and polar.

Page 10: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Tetrahedral Electronic Geometry: AB2U2 Species (Two Lone Pairs of

Electrons on A)

Valence Bond Theory (Hybridization)

2s 2pO [He]

four sp3 hybrids

H

C

HHH

Page 11: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Page 12: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Polarity

Page 13: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

13

Tetrahedral Electronic Geometry: ABU3 Species (Three Lone Pairs of

Electrons on A)

Some examples of molecules with this geometry are: HF, HCl, HBr, HI, FCl, IBr

These molecules are examples of central atoms with three lone pairs of electrons.Again, the electronic and molecular geometries are

different. Molecules are linear and polar when the two atoms

are different.Cl2, Br2, I2 are nonpolarnonpolar.

Page 14: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Tetrahedral Electronic Geometry: ABU3 Species (Three Lone Pairs of

Electrons on A)

Dot Formula (HF)

Electronic Geometry (HF)

Page 15: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Tetrahedral Electronic Geometry: ABU3 Species (Three Lone Pairs of

Electrons on A)

Molecular Geometry (HF)

Polarity (HF)

Page 16: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Tetrahedral Electronic Geometry: ABU3 Species (Three Lone Pairs of

Electrons on A)

Valence Bond Theory (Hybridization)

2s 2pF [He]

four sp3 hybrids

Page 17: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Trigonal Bipyramidal Electronic Geometry: AB5, AB4U, AB3U2, and

AB2U3

Some examples of molecules with this geometry are: PF5, AsF5, PCl5, etc.

These molecules are examples of central atoms with five bonding pairs of electrons.The electronic and molecular geometries are the same.

Molecules are trigonal bipyramidal and nonpolar when all five substituents are the same.If the five substituents are not the same, polar polar

molecules can result, AsF4Cl is an example.

Page 18: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Trigonal Bipyramidal Electronic Geometry: AB5, AB4U, AB3U2, and

AB2U3

Valence Bond Theory

Page 19: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Trigonal Bipyramidal Electronic Geometry: AB5, AB4U, AB3U2, and

AB2U3

Page 20: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Page 21: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Molecular Geometry

Trigonal Bipyramidal

Page 22: 1 Tetrahedral Electronic Geometry: AB 3 U Species (One Lone Pair of Electrons on A) Some examples of molecules with this geometry are: NH 3, NF 3, PH 3,

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Polarity