Chapter 11, Problem 11B.1ST

Interpretation Introduction

Interpretation:

Rotational constant of ${}^{\text{2}}{\text{H}}^{\text{35}}\text{C}$ has to be determined where $m_u\left({}^{2}H\right)=\text{ 2}{\text{.0141m}}_{\text{u}}$.

Concept Introduction:

Rotational constant of a molecule can be determined using the given formula.

  $\begin{array}{c}\text{Rotational constant, B = }\frac{\hslash }{\text{4πI}}\\ \\ \text{where,}\\ \text{I = moment of inertia }\end{array}$

Moment of inertia of diatomic molecules is given by,

  $\begin{array}{l}\text{Moment of inertia, I = }\mu {\text{R}}^2\\ \\ where,\mu =\frac{m_A{m}_B}{\left(m_A+m_B\right)}\end{array}$