Acta Cryst. (2008). E64, m39-m40  [ doi:10.1107/S1600536807062253 ]

Decaaquadioxidobis[₃-N-(phosphonatomethyl)iminodiacetato]dizinc(II)divanadium(IV) dihydrate

L. Cunha-Silva, F.-N. Shi, J. Klinowski, T. Trindade, J. Rocha and F. A. Almeida Paz

Abstract: The title compound, [Zn₂V₂(C₅H₆NO₇P)₂O₂(H₂O)₁₀]·2H₂O, contains a [V₂O₂(pmida)₂]^4- dimeric anionic unit [where H₄pmida is N-(phosphonomethyl)iminodiacetic acid] lying on a centre of symmetry which is exo-coordinated via the two deprotonated phosphonate groups to two Zn²⁺ cations, with the coordination environment of Zn completed by five water molecules. The crystal packing is mediated by an extensive network of strong and highly directional O-HO hydrogen bonds involving the water molecules (coordinated and uncoordinated) and the functional groups of pmida^4-, leading to a three-dimensional supramolecular network.

Online 6 December 2007

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