Acta Cryst. (2009). E65, m341-m342  [ doi:10.1107/S1600536809006771 ]

Tetraaquabis(nicotinamide-N¹)cobalt(II) bis(2-fluorobenzoate)

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

Abstract: The title complex, [Co(C₆H₆N₂O)₂(H₂O)₄](C₇H₄FO₂)₂, contains one Co(II) atom (site symmetry ), two monodentate nicotinamide (NA) ligands, four coordinated water molecules and two 2-fluorobenzoate (FB) anions. The four O atoms in the equatorial plane around the Co 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 29.8 (3)°, while the pyridine and benzene rings are oriented at a dihedral angle of 7.97 (12)°. In the crystal structure, molecules are linked by O-HO, N-HO and N-HF hydrogen bonds, forming an infinite three-dimensional network. - Contacts between the pyridine and benzene rings [centroid-centroid distance = 3.673 (3) Å] may further stabilize the crystal structure.

Online 28 February 2009

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