Acta Cryst. (2003). E59, m734-m735  [ doi:10.1107/S1600536803017045 ]

Polymeric tetraaqua(1,2,4,5-benzenetetracarboxylato)(pyrazine)dinickel(II) dihydrate

S.-Y. Yang, L.-S. Long, R.-B. Huang, L.-S. Zheng and S. W. Ng

Abstract: The Ni atom in the title compound, {[Ni₂(C₁₀H₂O₈)(C₄H₄N₂)(H₂O)₄]·2H₂O}_n, exists in an octahedral NO₅Ni coordination environment that is defined by the two O atoms of a chelating carboxyl group, the O atom of a monodentate carboxyl group belonging to another carboxylato tetraanion, two water molecules and the N atom of the N-heterocycle. The tetracarboxylato anion and the pyrazine molecule are each located on a center of inversion. The bonding pattern leads to the formation of a layer structure; the layers are linked into a three-dimensional network by extensive hydrogen bonds involving the water molecules and the O atoms of the anionic unit.

Online 15 August 2003

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