Question

Explain the non linear shape of H2S and non planar shape of PCl3 using valence shell electron pair repulsion theory.

Answer 1

Answer:

In both H2S and PCl3 ,lone pairs are present along with bond pairs around the central atom. According to VSEPR, theory L.P-L.P > L.P-B.P > B.P.-B.P. Therefore, shapes are different.

In H2S, S is the main atom which has 2 lone pairs. These lone pairs cause repulsion and move the H-S bond away causing non-linear shape. PCl3 is a trigonal planar shape. The vector addition of the 3 dipole moments gives a better of 0.