Diaquabis(2-iodobenzoato-kO)bis-(nicotinamide-kN(1))cobalt(II)

In the title complex, [Co(C7H4IO2)(2)(C6H6N2O)(2)(H2O)(2)], the Co II cation is located on an inversion center and is coordinated by two monodentate 2-iodobenzoate (IB) anions, two nicotinamide (NA) ligands and two water molecules. The four O atoms in the equatorial plane around the Co-II cation form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by the two N atoms of the NA ligands in the axial positions. The dihedral angle between the carboxylate group and the adjacent benzene ring is 22.3 (3)(circle), while the pyridine ring and the benzene ring are oriented at a dihedral angle of 84.59 (13)(circle). Intramolecular O-H center dot center dot center dot O hydrogen bonding occurs between the carboxylate group and coordinated water molecule. In the crystal, N-H center dot center dot center dot O, O-H center dot center dot center dot O and weak CH center dot center dot center dot O hydrogen bonds link the molecules into a three-dimensional supramolecular network.