Table of Molecular Geometries

Valence Electron- Bonding Lone Molecular Bond Possibility ABE Electron Pair Examples Pairs Pairs Geometry Angle of Dipole Pairs Geometry

AB 2 linear 2 0 linear 180 no BeF2 trigonal 3 0 120 no BF AB3 trigonal planar 3 3 planar bent less than 2 1 yes SO AB2E (angular) 120 2

AB4 4 0 tetrahedral 109.5 no CH4 trigonal less than 3 1 yes NH AB3E 4 tetrahedral pyramidal 109.5 3 bent less than 2 2 yes H O AB2E2 (angular) 109.5 2 trigonal eq-eq 120 AB5 5 0 no PCl5 bipyramidal ax-eq 90 trigonal eq-eq 120 AB4E 5 4 1 seesaw yes SF4 bipyramidal ax-eq 90 AB3E2 3 2 T-shaped 90 yes ClF3

AB2E3 2 3 linear 180 no XeF2

AB6 6 0 octahedral 90 no SF6 square 6 octahedral 5 1 90 yes IF AB5E pyramidal 5

AB4E2 4 2 square planar 90 no XeF4

A is the central atom B is the number of atoms of the other element bonded to the central atom E is the number of lone pairs on the central atom