Chapter 11, Problem 11B.13E

(a)

Interpretation Introduction

Interpretation:

Separation of the spectral lines in the pure rotational spectrum of ${}^1{H}^{35}Cl$ has to be determined in gigahertz when the rotational constant is $317.8GHz$.

Concept Introduction:

In the spectrum of a polar linear molecule or a polar symmetric rotor, the frequencies of two adjacent spectral lines are separated by 2B where B is the rotational constant.

(b)

Interpretation Introduction

Interpretation:

Separation of the spectral lines in the pure rotational spectrum of ${}^1{H}^{35}Cl$ has to be determined in reciprocal centimeters when the rotational constant is $317.8GHz$.

Concept Introduction:

In the spectrum of a polar linear molecule or a polar symmetric rotor, the frequencies of two adjacent spectral lines are separated by 2B where B is the rotational constant.

Wavenumber is the total number of wavelengths observed at a unit distance. Equation for wavenumber can be given as,

  $\text{Wavenumber, }\overline{\text{ν}}\text{ =}\frac{\text{1}}{\text{λ}}\text{ = }\frac{\text{ν}}{\text{c}}$

Where,

    $\begin{array}{c}\text{λ}\text{=}\text{wavelength}\\ \text{ν}=\text{frequency}\\ \text{c = speed of light}\end{array}$