ESR Studies on Salicylaldehyde Schiff Base Complexes of Copper(II). I. Bis(N-cyclohexyl- and N-cycloheptyl-salicylideneaminato)copper(II) Complexes and Their Derivatives in Polycrystals

Abstract

Abstract Twelve of the title complexes including color isomers show powder ESR spectra of various line shapes. These complexes are a novel series of copper(II) complexes which have very weak intermolecular spin-exchange interactions in crystals. Brown complexes and most green complexes show monomer and dimer ESR spectra, respectively. It is demonstrated by ESR measurements that the above green complexes are transformed into the brown ones only by grinding those green crystals finely and forcefully with agate mortar and pestle.