Coordination structure and intermolecular interactions in copper(II) acetate complexes with 1,10-phenanthroline and 2,2′-bipyridine

Abstract

The crystal structures of two coordination compounds, (acetato-κO)(2,2′-bipyridine-κ2 N,N′)(1,10-phenanthroline-κ2 N,N′)copper(II) acetate hexahydrate, [Cu(C2H3O2)(C10H8N2)(C12H8N2)](C2H3O2)·6H2O or [Cu(bipy)(phen)Ac]Ac·6H2O, and (acetato-κO)bis(2,2′-bipyridine-κ2 N,N′)copper(II) acetate–acetic acid–water (1/1/3), [Cu(C2H3O2)(C10H8N2)2](C2H3O2)·C2H4O2·3H2O or [Cu(bipy)2Ac]Ac·HAc·3H2O, are reported and compared with the previously published structure of [Cu(phen)2Ac]Ac·7H2O (phen is 1,10-phenanthroline, bipy for 2,2′-bipyridine, ac is acetate and Hac is acetic acid). The geometry around the metal centre is pentacoordinated, but highly distorted in all three cases. The coordination number and the geometric distortion are both discussed in detail, and all complexes belong to the space group P\overline{1}. The analysis of the geometric parameters and the Hirshfeld surface properties d norm and curvedness provide information about the metal–ligand interactions in these complexes and allow comparison with similar systems.