MOLECULAR GEOMETRY

Hybridi-   zation	Electron pairs   or bonds (*)	e- pair geometry	Bonding   pairs	Lone pairs	Molecular     geometry	Bond angles	ABn dipole? (**)
sp	2	Linear	2	0	Linear       (View here)	180	no
sp2	3	Trigonal     planar (flat)	3 2	0 1	Trigonal planar   Bent	120   120	no   yes
sp3	4	Tetrahedral	4 3 2	0 1 2	Tetrahedral     (View here)       Triangular pyramidal   Bent	109.5   <109.5   <109.5	no   yes   yes
dsp3	5	Trigonal     bipyramidal	5 4 3 2	0 1 2 3	Trigonal bipyramidal       See-saw       (View here)   T-shaped   Linear	90,  120     90,  120   90   180	no   yes   yes   no
d2sp3	6	Octahedral	6 5 4 3 2	0 1 2 3 4	Octahedral       (View here)   Square pyramidal   Square planar   T-shaped   Linear	all 90   all 90   all 90   all 90   180	no   yes   no   yes   no
	(*)Lone pairs count; double and triple bonds count only once. (**)In molecules where noncentral atoms are all the same.

rev. July 2010