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