Diaquabis(2-bromobenzoato-kappa O)bis(nicotinamide-kappa N-1)nickel(II)

Abstract

The title Ni-II complex, [Ni(C7H4BrO2)(2)(C6H6N2O)(2)(H2O)(2)], is centrosymmetric. It contains two 2-bromobenzoate (BB) ligands, two nicotinamide (NA) ligands and two water molecules, all of them being monodentate. The four O atoms in the equatorial plane around the Ni atom 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 30.81 (17)degrees, while the pyridine and benzene rings are oriented at a dihedral angle of 84.66 (6)degrees. In the crystal structure, O-H center dot center dot center dot O and N-H center dot center dot center dot O hydrogen bonds link the molecules into a supramolecular structure. A weak C-H center dot center dot center dot pi interaction is also found.