Chapter 7.4, Problem 5PPA

Interpretation Introduction

Interpretation: The bond angle of $\text{H-P-H}$ in ${\text{PH}}_3$ is ${94}^{\circ }$ should be explained on the basis of valence bond theory.

Concept introduction:

According to valence bond theory,

• The bonds between atoms are formed by sharing their electrons through the overlap of atomic orbitals between other atoms.
• The each overlapping atomic orbital must be contained with a single unpaired.
• The electron carried by each overlapping atomic of must have opposite spins.
• Formation of a bond between atoms should have lower potential energy as compared to the sum of potential energies of individual atoms.
• The bond angle of bonds is depends upon the angle between overlapping orbitals and lone pairs of central atom.