Acta Cryst. (2005). E61, m76-m78  [ doi:10.1107/S1600536804031344 ]

catena-Poly[[[tetraaquazinc(II)]--4,4'-bipyridine-²N:N'] 3-carboxylatophenoxyacetate monohydrate]

J.-G. Zhao, C.-S. Gu, L.-H. Huo, J.-W. Liu and S. Gao

Abstract: The crystal structure of the title complex, {[Zn(C₁₀H₈N₂)(H₂O)₄](C₉H₆O₅)·H₂O}_n, is built of infinite polymeric cationic {[Zn(4,4'-bipy)(H₂O)₄]²⁺}_n chains (4,4'-bipy = 4,4'-bipyridine), 3-carboxylatophenoxyacetate dianions (3-CPOA^2-) and solvent water molecules. Both symmetry-independent Zn atoms and 4,4'-bipy ligands occupy special positions on crystallographic inversion centres and form two symmetry-independent cationic chains stretching along the c axis of the crystal. Each of the two Zn atoms has an octahedral coordination environment formed by the O atoms of four water molecules and the N atoms of two 4,4'-bipy ligands in trans positions with respect to each other. The 4,4'-bipy ligands perform a bridging function, linking together two adjacent Zn atoms in the chain. The shortest ZnZn separation within the chains is equal to the c translation [11.425  (2)  Å]. The chains are further linked into a three-dimensional supramolecular network via hydrogen-bonding and - stacking interactions, involving the dianion and the coordinated and uncoordinated water molecules.

Online 11 December 2004

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