Structural studies of some copper(II) coordination compounds

Abstract

The crystal structures of four coordination compounds of copper(II) have been investigated by three-dimensional X-ray methods. The structure of one crystalline form of bis-(N-ethyl-salicylaldiminato) copper(II) has revealed that the copper atom in such a compound may adopt a tetrahedrally-distorted coordination geometry under less severe steric conditions than had previously been supposed. The structures of a methylamine perchlorate adduct of NN’-ethylenebis-(acetylacetoneiminato) copper(II) and p-nitrophenol and chloroform adducts of NN’-ethylenebis-(salicylaldiminato) copper(II) have indicated that the bonding requirements of the copper atom can be modified by hydrogen bonding involving a ligand atom.