Complementation of the crystal field for dihedral optical activity

Abstract

The d-electron optical activity of the tris-diamine complexes of cobalt(III), whether randomly oriented or with a fixed orientation in a single crystal, is quantitatively rationalised by a model in which the transient-induced electric dipole moments in the ligand groups are correlated collinear to the magnetic dipole moment of the metal-ion transition by the leading electric multipole moment of that transition, a hexadecapole.