Magnetic dipole and electric quadrupole polarizabilities from depolarized differential rayleigh light scattering for molecules with non-degenerate electronic states

Abstract

A general expression is proposed for the depolarized differential Rayleigh light scattering intensity (DDRLS) of circularly polarized light at arbitrary scattering angles θ and arbitrary symmetries of molecules, non-degenerate in their electronic ground state. The molecular symmetries for which DDRLS occurs at θ = π/2 and θ ≠ π/2 are specified. It is shown that for molecules with point group symmetries 3, 4, 6, ∞, 32, 422 and 622 the two mutually independent components of the electro-magnetic polarizability tensor G and that of the electric quadrupole polarizability tensor A can be determined from measurements of DDRLS and optical activity. For molecules with the symmetries 23, 432, Y and K a simple relation is shown to hold, for arbitrary θ, between the DDRLS intensity and the rotation of the light beam in the optical activity effect.