Received 9 May 2013
aKafkas University, Department of Chemistry, 63100 Kars, Turkey,bAksaray University, Department of Physics, 68100, Aksaray, Turkey,cDepartment of Physics, Sakarya University, 54187 Esentepe, Sakarya, Turkey, and dHacettepe University, Department of Physics, 06800 Beytepe, Ankara, Turkey
Correspondence e-mail: firstname.lastname@example.org
The molecule of the title CuII complex, [Cu(C7H4ClO2)2(C6H6N2O)2], contains two 3-chlorobenzoate (CB) and two nicotinamide (NA) ligands; the CB act as bidentate ligands, while the NA are monodentate ligands. The resulting CuN2O4 coordination polyhedron is a considerably distorted octahedron. The dihedral angles between the carboxylate groups and the adjacent benzene rings are 17.92 (12) and 24.69 (16)°, while the two benzene rings and the two pyridine rings are oriented at dihedral angles of 52.20 (8) and 1.56 (6)°. In the crystal, N-HN and C-HO hydrogen bonds link the molecules into a three-dimensional network. The - contact between the benzene rings [centroid-centroid distance = 3.982 (2) Å] may further stabilize the crystal structure.
For niacin, see: Krishnamachari (1974). For the nicotinic acid derivative N,N-diethylnicotinamide, see: Bigoli et al. (1972). For related structures, see: Greenaway et al. (1984); Hökelek & Necefoglu (1996); Hökelek et al. (1996); Hökelek, Dal et al. (2009); Hökelek, Yilmaz et al. (2009); Necefoglu et al. (2011); Sertçelik et al. (2013).
Data collection: APEX2 (Bruker, 2012); cell refinement: SAINT (Bruker, 2012); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: WinGX (Farrugia, 2012) and PLATON (Spek, 2009).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: RK2404 ).
The authors are indebted to Aksaray University and the Science and Technology Application and Research Center of Aksaray University, Aksaray, Turkey, for the use of X-ray diffractometer.
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