Received 4 April 2010
aDepartment of Chemistry, Kafkas University, 36100 Kars, Turkey,bDepartment of Physics, Karabük University, 78050 Karabük, Turkey,cDepartment of Chemistry, Faculty of Science, Anadolu University, 26470 Yenibaglar, Eskisehir, Turkey, and dDepartment of Physics, Hacettepe University, 06800 Beytepe, Ankara, Turkey
Correspondence e-mail: firstname.lastname@example.org
In the centrosymmetric mononuclear title complex, [Co(C8H7O2)2(C10H14N2O)2(H2O)2], the CoII ion is located on an inversion center. The asymmetric unit contains one 4-methylbenzoate (PMB) anion, one N,N-diethylnicotinamide (DENA) ligand and one coordinated water molecule. The four O atoms in the equatorial plane around the CoII ion form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by the two pyridine N atoms of the DENA ligands in the axial positions. The dihedral angle between the carboxylate group and the attached benzene ring is 3.73 (14)°, while the pyridine and benzene rings are oriented at a dihedral angle of 77.28 (6)°. In the crystal structure, intermolecular O-HO and C-HO hydrogen bonds link the molecules into a two-dimensional network parallel to (001). The structure is further stabilized by - contacts between the pyridine rings [centroid-centroid distance = 3.544 (1) Å] and weak C-H interactions involving the benzene ring.
For niacin, see: Krishnamachari (1974), and for the nicotinic acid derivative N,N-diethylnicotinamide, see: Bigoli et al. (1972). For related structures, see: Hökelek et al. (1996, 2009a,b,c); Hökelek & Necefoglu (1998); Necefoglu et al. (2010).
Data collection: APEX2 (Bruker, 2007); cell refinement: SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: Mercury (Macrae et al., 2006); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON (Spek, 2009).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: CI5076 ).
The authors are indebted to Anadolu University and the Medicinal Plants and Medicine Research Centre of Anadolu University, Eskisehir, Turkey, for the use of X-ray diffractometer. This work was supported financially by the Scientific and Technological Research Council of Turkey (grant No. 108 T657).
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