Optical rotatory power of co-ordination compounds. Part XV. Regional rules and electronic mechanisms for the optical activity of d→d transitions

Abstract

Regional rules correlating the optical activity of the d→d transitions with the substituent positions are suggested for chiral cobalt(III) complexes containing a tetragonal chromophore, [CoA₅B] or trans-[CoA₄B₂], or an octahedral chromophore [CoA₆]. In the latter case the contribution to the optical activity of the configuration of the chelate rings around the metal ion, and that of the conformation of each chelate ring, are distinguished by individual rules. Possible electronic mechanisms providing a basis for the regional rules are discussed.