STRUCTURE OF COPPER(II) 3-CYANOBENZOATE

[Cu(C8H4NO2)2], M(r) = 355.8, triclinic, P1BAR, a = 6.545 (4), b = 10.235 (5), c = 12.174 (6) angstrom, alpha = 74.40 (3), beta = 85.02 (4), gamma = 78.64 (3)-degrees, V = 769.6 (7) angstrom3, Z = 2, D(x) = 1.535 Mg m-3, lambda(Mo Kalpha) = 0.71069 angstrom, mu = 1.440 mm-1, F(000) = 358, room temperature, R = 0.029 for 1213 unique reflections having \F\ > 4sigma(\F\). The Cu atoms are coordinated by four 0 atoms from four carboxylate groups, one N atom from a cyano substituent and another Cu atom in a distorted octahedral arrangement. There are six coordination distances: four of 1.957 (3), 1.964 (3), 1.965 (3) and 1.975 (3) angstrom with the four carboxylate 0 atoms, one of 2.191 (4) angstrom with the N atom, and the largest of 2.664 (2) angstrom with the neighbouring Cu atom. The dimeric units formed by Cu-atom pairs are linked through the aromatic ligands building a polymeric chain structure.