Acta Cryst. (2007). E63, m2378-m2379  [ doi:10.1107/S1600536807040093 ]

catena-Poly[hexaaquazinc(II) bis[[triaquazincate(II)]--(5-carboxylato-m-phenylenedioxy)diacetato-²O¹:O⁵] heptahydrate]

Y.-H. Wen and S. W. Ng

Abstract: The reaction of zinc cations and (5-carboxy-m-phenylenedioxy)diacetate anions in water yields the title salt, {[Zn(H₂O)₆][Zn(C₁₁H₇O₈)(H₂O)₃]₂·7H₂O}_n. The cation has the Zn atom surrounded octahedrally by six water molecules. The anion exists as a linear carboxylate-bridged chain, as it uses the carboxy and one of the two oxyacetate arms of the trianion to connect the triaquazincate species. The Zn atoms in the two independent polyanionic chains exist in trigonal-bipyramidal geometries. The cation and anions are linked by extensive hydrogen bonds into a three-dimensional network structure.

Online 17 August 2007

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