Chapter 14, Problem 14B.3P

Interpretation Introduction

Interpretation:

The separation at which it is energetically favourable for the ${\text{H}}_{\text{2}}\text{O}$ molecule to rotate by $90°$ has to be calculated.

Concept introduction:

Polarized bonds are a result of the electronegativity difference between bonding atoms.  The more electronegative atom acquires a partial negative charge and the less electronegative atom acquires a partial positive charge.  This results in the formation of a dipole in the bond between the two atoms.