Question

Give the appropriate bond angles for each of the following: a. the O-Cl-O bond in ClO2-1...

Give the appropriate bond angles for each of the following:
a. the O-Cl-O bond in ClO2-1 b. the H-C-C bond in C2H4

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Homework Answers

Answer #1
Central atom: Cl
Cl contributes: 7 e−
2 x O contibute: 4 e−
-ve charge: 1 e−
Total VSE: 12
Total VSEP: 6
2 x double bonds: − 2 pairs
Revised Total: 4
Geometry: V-shaped (based on tetrahedral)

Notes

  • Large O=Cl=O bond angle (111°). VSEPR theory predicts that the bond angle should be less than 109° due to lone-pair repulsion.
    • Lone-pair:lone-pair repulsion is about the same as double-bond:double-bond repulsion.
    • Most of the negative charge on this ion will be on the oxygen atoms. These atoms will thus repel each other to some extent thus producing a larger than expected bond angle.

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