Chapter 11, Problem 11B.7DQ

Interpretation Introduction

Interpretation:

The role of the nuclear statics in the occupations of energy level in $\text{H}\text{C}\equiv \text{C}\text{H}$, $\text{H}\text{C}\equiv \text{C}\text{H}$, and $\text{H}\text{C}\equiv \text{C}\text{H}$ has to be stated.

Concept introduction:

A rotational spectrum is a spectrum in which only the rotation of molecule changes.  For a molecule to exhibit pure rotational spectrum, the molecule must possess a permanent electric dipole moment.  Nuclear statics is the selective existence of rotational states that stems from the Pauli principle.  Whenever a rotation interchanges equivalent nuclei, the nuclear statics is takes into account.