(IUCr) Crystallography Journals Online

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Acta Cryst. (2009). E65, m452 [ doi:10.1107/S1600536809008022 ]

Diaquabis(2,2'-biimidazole)zinc(II) 4,4'-dicarboxybiphenyl-3,3'-dicarboxylate

J. Kang, C.-C. Huang, Z.-Q. Jiang, S. Huang and S.-L. Huang

Abstract: In the title compound, [Zn(C₆H₆N₄)₂(H₂O)₂](C₁₆H₈O₈), the Zn^II 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 Zn^II complex cation and the anion are held together by N-HO hydrogen bonds, forming a zigzag chain along [2 $\\overline{1}$ 1]. The chains are further connected by water molecules via O-HO hydrogen bonds.

Online 28 March 2009