Acta Cryst. (2010). E66, m361-m362  [ doi:10.1107/S1600536810007385 ]

Diaquabis(4-methylbenzoato-O)bis(nicotinamide-N¹)nickel(II)

H. Necefoglu, E. Çimen, B. Tercan, E. Ermis and T. Hökelek

Abstract: The title Ni^II complex, [Ni(C₈H₇O₂)₂(C₆H₆N₂O)₂(H₂O)₂], is centrosymmetric with the Ni atom located on an inversion center. The molecule contains two 4-methylbenzoate (PMB) and two nicotinamide (NA) ligands and two coordinated water molecules, all ligands 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 26.15 (10)°, while the pyridine and benzene rings are oriented at a dihedral angle of 87.81 (4)°. In the crystal structure, intermolecular O-HO and N-HO hydrogen bonds link the molecules into a three-dimensional network. The - contact between the benzene rings [centroid-centroid distance = 3.896 (1) Å] may further stabilize the crystal structure. A weak C-H interaction involving the pyridine ring also occurs.

Online 3 March 2010

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