The colour isomerism and structure of copper co-ordination compounds. Part XX. Crystal structure of di-µ-NN′-m-phenylene-tetrakis(salicylideneiminato)dicopper(II)

Abstract

A three dimensional X-ray analysis of the copper complex of the Schiff base prepared from salicylaldehyde and m-phenylenediamine has revealed a dimeric, centrosymmetric, molecular structure in which two bis(salicylidene-iminato)copper(II) residues are bridged by two m-phenylene groups. The co-ordination geometry at each copper atom is almost midway between cis-planar and tetrahedral. Two chloroform molecules are associated with each dimer in a manner suggesting a very weak bifurcated hydrogen-bonding interaction with donor oxygen atoms.