Bis(μ-4-formyl­benzoato-κ(2) O:O′)bis­[(4-formyl­benzoato-κ(2) O,O′)bis­(iso­nicotin­amide-κN (1))copper(II)]

The asymmetric unit of the centrosymmetric dinuclear title compound, [Cu(2)(C(8)H(5)O(3))(4)(C(6)H(6)N(2)O)(4)], contains one half of the complex mol­ecule. The Cu(II) 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 CuN(2)O(4) octa­hedral coordination of each Cu(2+) 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.