Chapter 11, Problem 11F.4AE

Interpretation Introduction

Interpretation:

Whether the transitions are electric-dipole allowed or not has to be predicted.

Concept introduction:

Electrons can be excited from one energy level to another.  This shift of electrons is known as electronic spectra.  There are two rules that govern the electronic transitions. First, spin rule states that on moving of electrons from one level to another, there should be no change in the spin of the electron.  Second, the Orbital rule states that if a molecule has centre of symmetry then redistribution of electrons within the same subshell is forbidden.