Received 8 November 2011
aInstitute of Cash Crops, Hubei Academy of Agricultural Science, Wuhan 430064, People's Republic of China, and bKey Laboratory of Industrial Ecology and Environmental Engineering (MOE) and State Key Laboratory of Fine Chemicals, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, People's Republic of China
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The title compound, [Ni4(C6H5N3O)2(C6H6N3O)2(C5H5N)4](NO3)2, is a tetranuclear nickel complex containing a single-decker cation, located on an inversion center. The two unique NiII cations are N,N',N'',O-chelated by carboximidamidate(2-) and carboximidamidate(1-) anions, forming a distorted four-coordinate planar structure, while the other two NiII atoms are N,N',O,O'-chelated by the same bridging ligands and two pyridine molecules, affording six-coordinated metals in an octahedral geometry. The cation is isostructural with the complex crystallized with perchlorate counter-ions in place of nitrate.
For similar metal complexes, see: Kou et al. (2010); Papatriantafyllopoulou et al. (2008); Inglis et al. (2010); Deng & Ran (2011). For the synthesis of the ligand pyridine-2-amidoxine, see: Bernasek (1957).
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: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: BH2397 ).
This research was supported by the Natural Science Fund of Hubei Province (project ZRZ0140) and the National Natural Science Foundation of China (Nos. 20877013 and 20837001). The authors thank Professor Z.-M. Qiu of Hubei Academy of Agricultural Science for his valuable suggestions.
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Inglis, R., Stoumpos, C. C., Prescimone, A., Siczek, M., Lis, T., Wernsdorfer, W., Brechin, E. K. & Milios, C. J. (2010). Dalton Trans. 39, 4777-4785.
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