Received 14 March 2014
In the title complex, [Ni(NCS)2(C6H6N2O)2(H2O)2], the NiII ion is located on an inversion center and is coordinated in a distorted octahedral environment by two N atoms from two nicotinamide ligands and two water molecules in the equatorial plane, and two N atoms from two thiocyanate anions in the axial positions, all acting as monodentate ligands. In the crystal, weak N-HS hydrogen bonds between the amino groups and the thiocyanate anions form an R42(8) motif. The complex molecules are linked by O-HO, O-HS, and N-HS hydrogen bonds into a three-dimensional supramolecular structure. Weak - interactions between the pyridine rings is also found [centroid-centroid distance = 3.8578 (14) Å].
For background to the applications of transition metal complexes with biochemically active ligands, see: Antolini et al. (1982); Krishnamachari (1974). For related structures, see: Hökelek, Dal et al. (2009); Hökelek, Yilmaz et al. (2009); Özbek et al. (2009); Zhu et al. (2006).
Data collection: CrysAlis PRO (Agilent, 2012); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and Mercury (Macrae et al., 2008); software used to prepare material for publication: SHELXTL.
Supporting information for this paper is available from the IUCr electronic archives (Reference: HY2643 ).
The authors wish to extend their gratitude to Professor P. Chakrabarti, Director, MNNIT, Allahabad, for providing a Institute Research Fellowship to DP.
Agilent (2012). CrysAlis PRO. Agilent Technologies, Yarnton, England.
Antolini, L., Battaglia, L. P., Corradi, A. B., Marcotrigiano, G., Menabue, L., Pellacani, G. C. & Saladini, M. (1982). Inorg. Chem. 21, 1391-1395.
Hökelek, T., Dal, H., Tercan, B., Özbek, F. E. & Necefoglu, H. (2009). Acta Cryst. E65, m481-m482.
Hökelek, T., Yilmaz, F., Tercan, B., Özbek, F. E. & Necefoglu, H. (2009). Acta Cryst. E65, m768-m769.
Krishnamachari, K. A. V. R. (1974). Am. J. Clin. Nutr. 27, 108-111.
Macrae, C. F., Bruno, I. J., Chisholm, J. A., Edgington, P. R., McCabe, P., Pidcock, E., Rodriguez-Monge, L., Taylor, R., van de Streek, J. & Wood, P. A. (2008). J. Appl. Cryst. 41, 466-470.
Özbek, F. E., Tercan, B., Sahin, E., Necefoglu, H. & Hökelek, T. (2009). Acta Cryst. E65, m341-m342.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Zhu, C.-G., Wang, F.-W. & Wei, Y.-J. (2006). Acta Cryst. E62, m1816-m1817.