Magnetic Raman optical activity and Raman electron paramagnetic resonance

Abstract

All molecules in a magnetic field parallel to the incident light beam show a small difference in the intensity of Raman scattering at 90° in right and left circularly polarized incident light. The most interesting effects occur in vibrational resonance Raman scattering from odd-electron transition metal halides, and in pure electronic resonance Raman scattering from both odd- and even-electron molecules. These effects originate in Raman transitions between components of Zeeman-split degenerate levels, and provide information about the magnetic structure of the ground and low-lying excited levels (in particular the sign of the g-value and the ordering of magnetic sub-states). © 1985, IUPAC.