Question

Discuss the shape of the following molecules using the VSEPR model:

I) Asf5

ii) PH3
​

Answer 1

AsF5 -

The central atom has no lone pair and there are five bond pairs. Hence, the shape is trigonal bipyramidal.

PH3 -

The central atom has one lone pair and there are three bond pairs. Hence, the shape is trigonal bipyramidal.