(NICOTINAMIDE-N'-)BIS(4-NITROBENZOATO-O)COBALT(II)

The title cobalt complex, [Co(C7H4NO4)(2)(C6H6N2O)(2)(H2O)(2)], is mon omeric and centrosymmetric, and contains two water molecules, two 4-ni trobenzoate and two nicotinamide (NA) ligands, all acting as monodenta te ligands. The four nearest O atoms around the Co atom form a slightl y distorted square-planar arrangement, with a distorted octahedral coo rdination completed by the pyridine N atoms of the NA ligand, at a dis tance of 2.134 (2) Angstrom. The water molecules are hydrogen bonded t o the carboxyl O atoms [O ... O 2.634(5) Angstrom].