9.1 VSEPR Theory and Molecular Geometry
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VSEPR Theory (Valence Shell Electron Pair Repulsion)
| ElectronDomains | Electron DomainGeometry | BondAngles | Hybridization ofCentral Atom |
|---|---|---|---|
| 2 | Linear | 180° | sp |
| 3 | Trigonal Planar | 120° | sp2 |
| 4 | Tetrahedral | 109.5° | sp3 |
| 5 | Trigonal Bipyramidal | 90°, 120°, 180° | sp3d |
| 6 | Octahedral | 90°, 180° | sp3d2 |
| TABLE OF MOLECULAR GEOMETRIES | |||||
|---|---|---|---|---|---|
| ElectronDomains | No lone pairs | 1 lone pair | 2 lone pair | 3 lone pair | 4 lone pair |
| 2 |  | ||||
| 3 |  |  | |||
| 4 |  |  |  | ||
| 5 |  |  |  |  | |
| 6 |  |  |  |  |  |
Lone pairs of electrons typically reduce bond angles slightly.
2 Electron Domains (EDG = Linear)
3 Electron Domains (EDG = Trigonal Planar)
4 Electron Domains (EDG = Tetrahedral)
5 Electron Domains (EDG = Trigonal Bipyramidal)
6 Electron Domains (EDG = Octahedral)
