Acta Cryst. (2007). E63, m2908-m2909  [ doi:10.1107/S1600536807054864 ]

catena-Poly[4,4'-bipyridinium [bis(₃-pyrazole-3,5-dicarboxylato-⁵O⁵,N¹:N²,O³:O³)dicopper(II)]]

Q.-Q. Dou, Y.-K. He, L.-T. Zhang and Z.-B. Han

Abstract: The title compound, {(C₁₀H₁₀N₂)[Cu₂(C₅HN₂O₄)₂]}_n, has been synthesized under hydrothermal conditions. The self-assembly of the pyrazole-3,5-dicarboxylate ligands and Cu^II atoms results in a one-dimensional anionic chain, in which the Cu^II atom is five-coordinate in a square-pyramidal geometry. The doubly protonated 4,4'-bipyridine (bpy) cation lies on an inversion center. A two-dimensional supramolecular network is formed through N-HO hydrogen bonds between the bpy cations and the uncoordinated carboxylate O atoms of the polymeric anions. The dinuclear repeat unit with two bridging pyrazole rings is centrosymmetric.

Online 7 November 2007

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