Acta Cryst. (2008). E64, m651-m652  [ doi:10.1107/S1600536808009392 ]

Poly[(-3,5-dinitro-2-oxidobenzoato)(-3-hydroxypyridine)copper(II)]

J.-B. Yan, W.-D. Song, H. Wang and L.-L. Ji

Abstract: A new coordination polymer, [Cu(C₇H₂N₂O₇)(C₅H₅NO)]_n, exhibits a double-chain structure, in which 3,5-dinitro-2-oxidobenzoate and 3-hydroxypyridine both act as bridging ligands, connecting adjacent copper(II) centers to form an infinite double-stranded chain. The asymmetric unit contains one Cu^II ion, one 3,5-dinitro-2-oxidobenzoate ligand and a 3-hydroxypyridine ligand. Coordination by one N atom and three O atoms from two different 3,5-dinitro-2-oxidobenzoate ligands and a 3-hydroxypyridine ligand creates a square-planar Cu^II center, which is augmented by a less tightly bonded fifth phenol O atom to form a square-pyramidal five-coordinate complex with an essentially planar base. The double-stranded chains are stabilized by intrachain - interactions [the centroid-to-centroid distance between adjacent aromatic rings is 3.719 (7) Å], and further linked through O-HO hydrogen bonds, forming a three-dimensional supramolecular network.

Online 10 April 2008

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