Received 16 April 2012
The asymmetric unit of the title compound, [Ni(C15H14N3S2)2], consists of two independent molecules with similar configurations. Each Ni2+ cation is coordinated in a cis-mode by two tridentate N,N',S-chelating Schiff base ligands, creating a distorted octahedron [the smallest angle being 77.57 (7)° and the widest being 168.97 (7)° for one molecule, and 78.04 (7) and 167.55 (7)° for the second molecule]. The dihedral angle between the mean coordination planes of the two ligands is 86.76 (7)° for one and 89.99 (7)° for the second molecule. - interactions between neighbouring pyridine rings with plane-to-plane distances of 3.540 (1) and 3.704 (1) Å are observed.
For background to the coordination chemistry of hydrazine carbodithioates, see: Ravoof et al. (2010). For the synthesis, see: Ravoof et al. (2004). For related structures, see: Ali et al. (1997, 1999); Omar et al. (2012).
Data collection: CrysAlis PRO (Agilent, 2011); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: CRYSTALS (Betteridge et al., 2003); molecular graphics: CAMERON (Watkin et al., 1996); software used to prepare material for publication: CRYSTALS.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: WM2622 ).
Support for the project came from Universiti Putra Malaysia (UPM) under research University Grant Schemes (RUGS No. 05-01-11-1243RU & RUGS No. 9174000) and the Malaysian Fundamental Research Grant Scheme (FRGS No. 01-03-11-986FR). SAO wishes to thank UPM for the award of a Graduate Research Fellowship.
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