Acta Cryst. (2008). E64, m61  [ doi:10.1107/S1600536807062800 ]

catena-Poly[[[triaquacopper(II)]-₂-pyrazine-2,3-dicarboxylato] monohydrate]

W.-P. Wu, F.-C. Zeng, Y. Wu and J. Peng

Abstract: The Cu atom in the title complex, {[Cu(C₆H₂N₂O₄)(H₂O)₃]·H₂O}_n or {[Cu(L)(H₂O)₃]·H₂O}_n (L is pyrazine-2,3-dicarboxylate), displays octahedral coordination formed by the ligand L and three coordinated water molecules. The ligand L is tridentate, with one N atom of the pyrazine ring and one O atom of one carboxylate group forming a chelate ring, whereas one O atom from the second carboxylate group is coordinated to another Cu atom. The ligand L links molecules to form an infinite chain parallel to the [101] direction. The chains are further linked through O-HO and O-HN hydrogen bonds involving the water molecules to build up a three-dimensional network.

Online 6 December 2007

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