Acta Cryst. (2009). E65, m1608-m1609  [ doi:10.1107/S1600536809048089 ]

Bis(-2-fluorobenzoato-1:2²O:O')(2-fluorobenzoato-1²O,O')(2-fluorobenzoato-2O)dinicotinamide-1N¹,2N¹-dizinc(II)-2-fluorobenzoic acid (1/1)

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

Abstract: The asymmetric unit of the title compound, [Zn₂(C₇H₄FO₂)₄(C₆H₆N₂O)₂]·C₇H₅FO₂, consists of a binuclear Zn^II complex bridged by two carboxyl groups of 2-fluorobenzoate (FB) anions and a 2-fluorobenzoic acid molecule. The two bridging FB anions, one chelating FB anion and one nicotinamide (NA) ligand coordinate to one Zn cation with a distorted square-pyramidal geometry, while the two bridging FB anions, one monodentate FB anion and one NA ligand coordinate to the other Zn cation with a distorted tetrahedral geometry. Within the binuclear molecule, the pyridine rings are oriented at a dihedral angle of 19.41 (14)°. In the crystal structure, the uncoordinated 2-fluorobenzoic acid molecules are linked by O-HO hydrogen bonding, forming centrosymmetric supramolecular dimers. Intermolecular N-HO hydrogen bonds link the complex molecules into a three-dimensional network. The - contacts between nearly parallel pyridine and benzene rings [dihedral angles of 19.41 (14) and 12.72 (16)°, respectively, centroid-centroid distances = 3.701 (2) and 3.857 (3) Å] may further stabilize the crystal structure. The fluorine atoms in two FB ligands are disordered over two positions, with occupancy ratios of 0.70:0.30.

Online 21 November 2009

Copyright © International Union of Crystallography
IUCr Webmaster