Acta Cryst. (2008). E64, m267-m268  [ doi:10.1107/S1600536807067153 ]

Poly[propane-1,3-diammonium [cuprate(II)-bis(₂-pyridine-2,3-dicarboxylato)] trihydrate]

H. Aghabozorg, R. Khadivi, M. Ghadermazi, H. Pasdar and S. Hooshmand

Abstract: The title polymeric compound {(C₃H₁₂N₂)[Cu(C₇H₃NO₄)₂]·3H₂O}_n or {(pnH₂)[Cu(py-2,3-dc)₂]·3H₂O}_n (pn is propane-1,3-diamine and py-2,3-dcH₂ is pyridine-2,3-dicarboxylic acid), was synthesized by reaction of copper(II) chloride dihydrate with a proton-transfer compound, propane-1,3-diammonium pyridine-2,3-dicarboxylate or (pnH₂)(py-2,3-dc), in aqueous solution. The anion is a six-coordinate complex (site symmetry ), with a distorted octahedral geometry around Cu^II, consisting of two bidentate pyridine-2,3-dicarboxylate groups and two O atoms of bridging ligands from (py-2,3-dc)^2- fragments, which are located in trans positions. The (pnH₂)²⁺ cation is disordered over two sites by the center of inversion. Intermolecular hydrogen bonds, - [centroid-centroid distances of 3.539 (3) Å] and C-O stacking interactions [OCg = 3.240 (5) Å; Cg is the center of the pyridine ring], connect the various components into a supramolecular structure.

Online 4 January 2008

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