Acta Cryst. (2009). E65, m466-m467  [ doi:10.1107/S1600536809011209 ]

Diaquabis(2-chlorobenzoato-O)bis(nicotinamide-N¹)nickel(II)

T. Hökelek, H. Dal, B. Tercan, F. E. Özbek and H. Necefoglu

Abstract: The title Ni^II complex, [Ni(C₇H₄ClO₂)₂(C₆H₆N₂O)₂(H₂O)₂], is centrosymmetric with the Ni atom located on an inversion centre. The molecule contains two 2-chlorobenzoate (CB) and two nicotinamide (NA) ligands and two 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 carboxyl group and the adjacent benzene ring is 29.48 (16)°, while the pyridine and benzene rings are oriented at a dihedral angle of 83.16 (5)°. In the crystal structure, O-HO and N-HO hydrogen bonds link the molecules into infinite chains. - Contacts between the benzene and pyridine rings [centroid-centroid distance = 3.952 (1) Å] may further stabilize the crystal structure. There is also a C-H interaction.

Online 31 March 2009

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