Molecular Spectrocopy,1e

3

Rotational Spectrum

CHAPTER OBJECTIVES

3.1 Introduction

3.2 Rotational Motion of Dumbbell-Shaped Species (or Diatomic Molecule as Rigid Rotator)

3.3 Quantum Restrictions on Rotation of Diatomic Molecule

3.4 Rotational Spectrum and Bond lengths of Diatomic Molecules

3.5 Interaction of Radiation with Molecule

3.6 Spectrum

3.7 Thermal Distribution of Rotational Quantum States (Intensities of the Rotational Lines)

3.8 Limitations of Simple Model

3.9 Polyatomic Molecules

3.10 Microwave Spectrometer

3.11 Stark Effect in Relation to Dipole Moment Determination from Rotational Spectrum

3.12 Applications of Microwave Spectroscopy

3.1 INTRODUCTION

We have learnt in Chapter 1 that the rotation of the molecules constitutes the lowest quantum of energy, ...