Hokelek T., NECEFOGLU H.

ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, vol.55, pp.1438-1440, 1999 (SCI-Expanded) identifier identifier


The title compound, [Co(C7H5O3)(2)(C6H6N2O)(2)(H2O)(2)]. is a monomeric and centrosymmetric cobalt complex. It contains two 3-hydroxybenzoate anions, two nicotinamide (NA) molecules and two water molecules as ligands. Each ligand is monodentate, The two nearest carboxylate O atoms and the two water O atoms form a slightly distorted square-planar arrangement around the Co atom [with distances of 2.099 (3) and 2.132 (3) Angstrom, respectively], while the distorted octahedral coordination is completed by the pyridine N atoms of the NA ligands at a distance of 2.139 (4) Angstrom. There is an intramolecular hydrogen bond between the nicotinamide N and O atoms [N ... O 2.228(6) Angstrom], and the hydroxybenzoate and water O atoms form inter- [2.662(5) Angstrom] and intramolecular [2.586 (5) Angstrom] hydrogen bonds, respectively, with the non-coordinated O atom of the carboxylate group.