Received 20 January 2009
In the title compound, [Zn(C6H6N4)2(H2O)2](C16H8O8), the ZnII atom, located on an inversion centre, is coordinated by two aqua and two bidentate biimidizole ligands, resulting in a slightly distorted octahedral ZnO2N4 geometry. The four N atoms from the two biimidizole ligands lie in the equatorial plane and the two aqua O atoms lie in the axial sites. The biphenyltetracarboxylate anion also lies on an inversion centre. The ZnII complex cation and the anion are held together by N-HO hydrogen bonds, forming a zigzag chain along . The chains are further connected by water molecules via O-HO hydrogen bonds.
Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT-Plus (Bruker, 2001); data reduction: SAINT-Plus; 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: IS2385 ).
This work was supported by the Foundation of the Education Committee of Fujian Province (JA08103), and the Foundation of Daiichi Pharmaceutical (Beijing) Co, Ltd. (No. 06B004).
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