Intermolecular interactions between chelate rings and phenyl rings in square-planar copper(II) complexes

Abstract

Analysis of the geometrical parameters in crystal structures of square-planar copper(II) complexes from the CSD shows that the short noncovalent copper (II)-phenyl carbon distances are a consequence of the interaction between the phenyl ring and the chelate ring with delocalized pi-bonds. The data show a correlation between the distances between the centers of the chelate and phenyl rings and the copper(II)-carbon distances, as well as a mutual slipped-parallel orientation of the phenyl and chelate rings. ((C) Wiley-VCH Verlag GmbH and Co. KGaA, 69451 Weinheim, Germany, 2004).