Crystal structure of trans -diaquabis(4-cyanobenzoato-κ O )bis(nicotinamide-κ N 1 )cobalt(II)

• Published in: Acta crystallographica. Section E, Crystallographic communications Crystallographic communications, 2015-05, Vol.71 (5), p.561-563
• Main Authors: Aşkın, Gülçin Şefiye, Necefoğlu, Hacali, Yılmaz Nayir, Gamze, Çatak Çelik, Raziye, Hökelek, Tuncer
• Format: Article
• Language: English
• Subjects: cobalt(II); crystal structure; transition metal complexes of benzoic acid and nicotinamide derivatives
• ISSN: 2056-9890; 2056-9890
• DOI: 10.1107/S2056989015008270

In the title complex, [Co(C 8 H 4 NO 2 ) 2 (C 6 H 6 N 2 O) 2 (H 2 O) 2 ], the Co II atom is located on an inversion centre and is coordinated by two 4-cyanobenzoate (CNB) anions, two nicotinamide (NA) ligands and two water molecules. The four O atoms in the equatorial plane form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination sphere is completed by the two N atoms of the NA ligands in the axial positions. The dihedral angle between the carboxylate group and the adjacent benzene ring is 22.11 (15)°, while the pyridine and benzene rings are oriented at a dihedral angle of 89.98 (5)°. In the crystal, intermolecular N—H...O and O—H...O hydrogen bonds link the molecules, enclosing R 2 2 (8) and R 4 4 (8) ring motifs, forming layers parallel to (100). The layers are linked via C—H...O and C—H...N hydrogen bonds, resulting in a three-dimensional network. A weak C—H...π interaction is also observed.