trans -Tetraaquabis(isonicotinamide-κ N 1 )cobalt(II) bis(3-hydroxybenzoate) tetrahydrate

• Published in: Acta crystallographica. Section E, Structure reports online Structure reports online, 2012-03, Vol.68 (3), p.m249-m250
• Main Authors: Zaman, İIbrahim Göker, Çaylak Delibaş, Nagihan, Necefoğlu, Hacali, Hökelek, Tuncer
• Format: Article
• Language: English
• ISSN: 1600-5368; 1600-5368
• DOI: 10.1107/S1600536812003911

The asymmetric unit of the title compound, [Co(C6H6N2O)2(H2O)4](C7H5O3)2·4H2O, contains one-half of the complex cation with the CoII ion located on an inversion center, a 3-hydroxybenzoate counter-anion and two uncoordinated water molecules. Four water O atoms in the equatorial plane around the CoII ion [Co—O = 2.0593 (16) and 2.1118 (16) Å] form a slightly distorted square-planar arrangement, and the distorted octahedral geometry is completed by the two N atoms [Co—N = 2.1306 (18) Å] from two isonicotinamide ligands. In the anion, the carboxylate group is twisted from the attached benzene ring at 8.84 (17)°. In the crystal, a three-dimensional hydrogen-bonding network, formed by classical O—H...O and N—H...O hydrogen bonds, consolidates the crystal packing, which exhibits π–π interactions between the benzene and pyridine rings, with centroid–centroid distances of 3.458 (1) and 3.606 (1) Å, respectively.