HL Only
2.2.13 Expanded Octet & Hybridization
Geometries for 5 and 6 electron domains.
Hybridization
4 equivalent hybrid orbitals (1s + 3p). 109.5° angle.
Hybrid Orbital (Bonding)
5 Electron Domains
| Lone Pairs | Geometry | Angles | Example |
|---|---|---|---|
| 0 | Trigonal Bipyramidal | 90°, 120°, 180° | PCl₅ |
| 1 | See-saw | 90°, 120°, 180° | SF₄ |
| 2 | T-shaped | 90°, 180° | ClF₃ |
| 3 | Linear | 180° | I₃⁻ |
6 Electron Domains
| Lone Pairs | Geometry | Angles | Example |
|---|---|---|---|
| 0 | Octahedral | 90°, 180° | SF₆ |
| 1 | Square Pyramidal | 90°, 180° | BrF₅ |
| 2 | Square Planar | 90°, 180° | XeF₄ |