Received 10 November 2009
The title complex, [Ni2(C6H2N3O7)2(C10H20N4O4)], contains a centrosymmetric binuclear unit in which the oxamide ligand (located on a centre of symmetry) acts in a bis-tetradentate fashion and the picrate anion binds to nickel(II) in a bidentate mode. The NiII atom displays a distorted octahedral coordination with axial elongation. The binuclear molecules are linked by intermolecular N-HO, O-HO and C-HO hydrogen bonds into a two-dimensonal supramolecular network extending parallel to (100).
Data collection: SMART (Bruker, 1998); cell refinement: SAINT (Bruker, 1998); 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: SHELXL97 and PLATON (Spek, 2009).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: SI2223 ).
We acknowledge the financial support of the Science Foundation of Shandong.
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