Examples
[ClO2]−
| 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.