ESR Studies on the Bonding in Copper Complexes

Abstract

ESR spectra of copper complexes have been interpreted by means of molecular orbital theory, and the ``covalent'' character of both σ and π bonds have been discussed for a variety of compounds. Overlap integrals have been considered in a consistent manner in treating σ bonds. Particular attention has been given to Cu phthalocyanine and several of its derivatives. The in-plane π bonding may be as important in determining the properties of a Cu complex as is the in-plane σ bonding.