Acta Cryst. (2004). E60, m1475-m1477  [ doi:10.1107/S1600536804023037 ]

catena-Poly[[[aquadipyridinecopper(II)]--1,3-phenylenedioxydiacetato-²O:O'] dihydrate]

S. Gao, J.-W. Liu, L.-H. Huo, H. Zhao and S. W. Ng

Abstract: The crystal structure of the title compound, {[Cu₂(C₁₀H₈O₆)₂(C₅H₅N)₄(H₂O)₂]·4H₂O}_n, consists of linear chains built from Cu(C₁₀H₈O₆)(C₅H₅N)₂(H₂O) units (where the CuB atom lies on a general position) bridged through the dicarboxylate dianion to two other Cu(C₁₀H₈O₆)(C₅H₅N)₂(H₂O) units (the CuA and CuC atoms lie on different inversion centers). The CuA and CuC atoms of the two units at the inversion centers are disordered over two sites, and the disorder is such that these atoms are five-coordinate in one component as both are coordinated by water molecules, whereas the CuA' and CuC' component atoms are only four-coordinate, as the metal-water distance exceeds 3  Å. The compound is formally a co-crystal, namely catena-poly[[[aquabis(pyridine-N)copper(II)]--1,3-phenylenedioxydiacetato-²-O:O'] dihydrate]-catena-poly[[[bis<(pyridine-N)copper(II)]--1,3-phenylenedioxydiacetato-²-O:O'] trihydrate] (1.5/0.5).

Online 25 September 2004

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