Date Published: June 01, 2012
Publisher: International Union of Crystallography
Author(s): Amir Shokooh Saljooghi, Hadi Amiri Rudbari, Francesco Nicolò, Maliheh Zahmati, Fatemeh Delavar Mendi.
The title compound, [Cu3(C7H3NO4)4(C2H8N2)2]·C2H8N2·4H2O, was obtained by the reaction of copper(II) acetate dihydrate with pyridine-2,6-dicarboxylic acid (H2dipic) and ethylenediamine (en) in an aqueous solution. All of the CuII atoms in the trinuclear centrosymmetric title complex are six-coordinated in a distorted octahedral geometry with N2O4 and N4O2 environments for the outer and central CuII atoms, respectively. Various interactions, including numerous O—H⋯O and C—H⋯O hydrogen bonds and C—O⋯π stacking of the pyridine and carboxylate groups [O⋯centroid distances = 3.669 (2) and 3.668 (2) Å] are observed in the crystal structure.
For metal complexes formed by pyridinedicarboxylic acids, see: Aghabozorg et al. (2006 ▶); Burdock (1996 ▶); Douki et al. (2005 ▶); Kazuhiro et al. (1994 ▶); Murakami et al. (2003) ▶; Park et al. (2007 ▶); Xie et al. (2006 ▶).