Received 9 September 2010
The ionic title complex, [Ni(C2H8N2)3](SiF6), is built up of [Ni(en)3]2+ complex cations (en = 1,2-diaminoethane) and hexafluoridosilicate anions. Single crystals of the title complex were isolated from an aqueous-ethanolic Ni2+-en-SiF62- system. The Ni(II) and Si atoms are each located on a special position with site symmetry 3.2. The Ni(II) atom coordination sphere is octahedrally deformed, being coordinated by three chelating diamine ligands with an Ni-N distance of 2.1233 (18) Å. The crystal packing of the respective ions corresponds to the structure type of the hexagonal form of BN. Beside ionic forces, the packing is governed by N-HF hydrogen bonds, which lead to the formation of hydrophobic channels running along the 63 screw axis. The structure was refined as an inversion twin [0.49 (3): 0.51 (3)].
For the hexafluoridosilicate anion acting as simple counter-ion, see: Li et al. (2009). For two nickel(II) complexes containing the hexafluoridosilicate anion as counter-ion, see: Spek et al. (1988); Wu et al. (2008). For complexes containing the [Ni(en)3]2+ complex cation and hexafluorido-type anions, see: Pan et al. (2005); Ribas et al. (1998); James et al. (1998); Contakes et al. (2000).
Data collection: CrysAlis PRO (Oxford Diffraction, 2009); 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: DIAMOND (Crystal Impact, 2007); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: SU2212 ).
This work was supported by the Slovak grant agencies VEGA (grant 1/0089/09) and APVV (contract Nos. APVV-VVCE-0058-07 and APVV-0006-07). Support from P. J. Safárik University (VVGS PF 19/2010/CH) is also gratefully acknowledged. We thank student M. Adam for help with the experimental work.
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