Trans-Diaquabis(4-fluorobenzoato-κO)bis(nicotinamide-κN 1)nickel(II)

Abstract

In the mononuclear NiII title complex, [Ni(C7H 4FO2)2(C6H6N 2O)2(H2O)2], the NiII atom, located on an inversion center, is coordinated by two nicotinamide and two 4-fluoro-benzoate ligands and two water molecules in a distorted N 2O4 octahedral geometry. The dihedral angle between the carboxylate group and the adjacent benzene ring is 8.95 (8)°, while the pyridine ring and the benzene ring are oriented at a dihedral angle of 75.01 (7)°. The water molecule links the adjacent carboxylate O atom via an intra-molecular O - H⋯O hydrogen bond. In the crystal, O - H⋯O, N - H⋯O, C - H⋯O and C - H⋯F hydrogen bonds link the molecules into a three-dimensional network. π-π stacking between parallel pyridine rings [centroid-centroid distance = 3.7287 (11) Å] is also observed. © Necefoǧlu et al. 2011.