Chemical Bonding and Molecular Structure Part 1

2 lone pair +3 bond pair
Stearic number =5
So, general formula is AB3L2.

(Here, L = number of lone pair.)
Hybridisation =sp3d.
So, the shape is T- shapeNote Geometry of the compound having sp3d hybridisation should to tetragonal bipyramidal (TBP) according to VSEPR theory. But due to two lone pair, geometry is distorted.
In TBP lone pair occupy equatorial position.