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

The crystal structures of two coordination compounds, (acetato-kappa O)(2,2 '-bipyridine-kappa N-2,N ')(1,10-phenanthroline-kappa N-2,N ')copper(II) acetate hexahydrate, [Cu(C2H3O2)(C10H8N2)(C12H8N2)](C2H3O2)center dot 6H(2)O or [Cu(bipy)(phen)Ac]Ac center dot 6H(2)O, and (acetato-kappa O)bis(2,2 '-bipyridine-kappa N-2,N ')copper(II) acetate-acetic acid-water (1/1/3), [Cu(C2H3O2)(C10H8N2)(2)](C2H3O2)center dot C2H4O2 center dot 3H(2)O or [Cu(bipy)(2)-Ac]Ac center dot HAc center dot 3H(2)O, are reported and compared with the previously published structure of [Cu(phen)(2)Ac]Ac center dot 7H(2)O (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 (1) over bar. 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.