Received 18 December 2009
The asymmetric unit of the title compound, [Ni(C12H8N2)3][Cr2O7]·4H2O, contains one cation, one anion and four water molecules, three of which are disordered over two sites with equal occupancies. In the cation, the metal centre is coordinated by six N atoms from three 1,10-phenanthroline ligands in a distorted octahedral geometry. The [Cr2O7]2- anion exhibits a staggered conformation. The crystal packing is stabilized by intermolecular O-HO hydrogen bonds and - interactions, evidenced by short distances of 3.531 (5) Å between the centroids of aromatic rings.
Data collection: APEX2 (Bruker, 2000); cell refinement: SAINT (Bruker, 2000); 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: CV2680 ).
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