Received 13 April 2011
The asymmetric unit of the title complex, (C6H13N4)2[Ni(C4N2S2)2], comprises one 1-azonia-3,5,7-triazatricyclo[220.127.116.11,7]decane cation and one half of an [Ni(mnt)2]2- (mnt2- is maleonitriledithiolate or 1,2-dicyanoethene-1,2-dithiolate) dianion. The Ni2+ ion is located on a center of inversion and is coordinated by four S atoms from two mnt2- ligands in a square-planar coordination mode. Intermolecular N-HN hydrogen-bond interactions link one anion and two cations in the crystal structure.
For general background to square-planar M[dithiolene]2 complexes acting as magnetic materials or showing non-linear optical properties, see: Duan et al. (2010). For the synthesis, see: Pei et al. (2010). For related structures, see: Ren et al. (2002). For related literature on spectroscopic properties, see: Bigoli et al. (2002).
Data collection: SMART (Siemens, 1996); cell refinement: SAINT (Siemens, 1996); 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: IM2281 ).
The authors thank the Doctorial Innovation Fund of Nanjing University of Technology (grant No. BSCX200908).
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