Bis(Μ-4-Formyl­Benzoato-Κ2 O:O′)Bis­[(4-Formyl­Benzoato-Κ2 O,O′)Bis­(Iso­Nicotin­Amide-Κn 1)Copper(II)]

Abstract

The asymmetric unit of the centrosymmetric dinuclear title compound, [Cu2(C8H5O3)4(C6H6N2O)4], contains one half of the complex mol­ecule. The CuII atoms are bridged by the carboxyl­ate groups of two 4-formyl­benzoate (FOB) anions. Besides the two bridging FOB anions, one additional chelating FOB anion and two isonicotinamide (INA) ligands complete the distorted CuN2O4 octa­hedral coordination of each Cu2+ cation. Within the asymmetric unit, the benzene and pyridine rings are oriented at dihedral angles of 25.1 (3) and 12.6 (3)°, respectively. In the crystal, N—H⋯O and C—H⋯O hydrogen bonds link the mol­ecules into a three-dimensional network. π–π contacts between the pyridine rings [shortest centroid–centroid distance = 3.821 (3) Å] may further stabilize the crystal structure. One of the formyl groups of the two FOB anions is disordered over two sets of sites with an occupancy ratio of 0.65:0.35.