Examples
[SO3]2−
| Central atom: | S |  |
|---|---|---|
| S contributes: | 6 e− | |
| 3 x O contibute: | 6 e− | |
| 2 x −ve charge: | 2 e− | |
| Total VSE: | 14 | |
| Total VSEP: | 7 | |
| 3 x double bonds | − 3 pairs | |
| Revised Total: | 4 | |
| Geometry: | Trigonal pyramidal (based on tetrahedral) | |
Note
- O=S=O bond angle = 107° (less than 109° due to lone-pair repulsion)