Crystal structure of tetrakis(μ-2,4,6-trimethylbenzoato-κ 2 O : O ′)bis[(nicotinamide-κ N 1 )copper(II)]

• Published in: Acta crystallographica. Section E, Crystallographic communications Crystallographic communications, 2015-08, Vol.71 (8), p.989-992
• Main Authors: Aşkın, Gülçin Şefiye, Necefoğlu, Hacali, Özkaya, Safiye, Dilek, Nefise, Hökelek, Tuncer
• Format: Article
• Language: English
• Subjects: 2,4,6-trimethylbenzoate; copper(II) complex; crystal structure; nicotinamide ligand
• ISSN: 2056-9890; 2056-9890
• DOI: 10.1107/S2056989015013882

In the title binuclear Cu II complex, [Cu 2 (C 10 H 11 O 2 ) 4 (C 6 H 6 N 2 O) 2 ], the two Cu II cations [Cu...Cu = 2.5990 (5) Å] are bridged by four 2,4,6-trimethylbenzoate (TMB) anions. The four nearest O atoms around each Cu II cation form distorted square-planar arrangements and the distorted square-pyramidal coordinations are completed by the pyridine N atoms of nicotinamide molecules at distances of 2.164 (2) and 2.165 (2) Å, respectively. The Cu II cations are displaced by −0.2045 (3) and 0.2029 (3) Å from the corresponding planes formed by the nearest four O atoms. In the molecule, the dihedral angles between the planes of the benzene rings and the adjacent carboxylate groups are 80.6 (2), 51.4 (2), 24.4 (2) and 32.5 (2)°, while the planes of the pyridine rings are oriented at a dihedral angle of 11.28 (10)°. In the crystal, bifurcated N—H...O and weak C—H...O hydrogen bonds link the molecules, enclosing R 2 2 (8) and R 4 4 (8) ring motifs, into a three-dimensional network. The structure contains a solvent-accessible void of 72 Å 3 , but there is no solvent molecule located within this void. The crystal studied was an inversion twin refined with a minor component of 0.488 (8).