Theorem Useful for Interpretation of Magnetic Circular Dichroism Spectra

Abstract

It is shown that the magneto‐optical activity associated with a symmetry‐forbidden transition is of second or higher order in any perturbation and that the contributions to the magnetic rotational strengths of perturbations belonging to different irreducible representations are additive. This theorem can be useful in analyzing the vibrational structure of a forbidden spectral band and in elucidating the conformations of molecular systems. The problem of the origin dependence of the magnetic rotational strengths is also discussed.