Acta Cryst. (2008). E64, m252-m253  [ doi:10.1107/S1600536807067207 ]

Aqua(4-hydroxypyridine-2,6-dicarboxylato)(1,10-phenanothroline)copper(II) 4.5-hydrate

H. Aghabozorg, E. Motyeian, J. Soleimannejad, M. Ghadermazi and J. Attar Gharamaleki

Abstract: The title compound, [Cu(C₇H₃NO₅)(C₁₂H₈N₂)(H₂O)]·4.5H₂O or [Cu(hypydc)(phen)(H₂O)]·4.5H₂O (phen is 1,10-phenanthroline and hypydcH₂ is 4-hydroxypyridine-2,6-dicarboxylic acid), was obtained by the reaction of copper(II) nitrate hexahydrate with the proton-transfer compound (phenH)₂(hypydc) in aqueous solution. Both the cationic and the anionic fragments of the proton-transfer compound are involved in complexation. Each Cu^II atom has a distorted octahedral geometry. It is hexacoordinated by three O atoms and three N atoms, from one phen fragment (as bidentate ligand), one (hypydc)^2- unit (as tridentate ligand) and a water molecule. In the crystal structure, O-HO and C-HO hydrogen bonds, and - stacking interactions [centroid-to-centroid distance 3.5642 (11) Å] between the phen ring systems, contribute to the formation of a three-dimensional supramolecular structure.

Online 21 December 2007

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