Acta Cryst. (2008). E64, m1616-m1617  [ doi:10.1107/S1600536808038919 ]

catena-Poly[[[diaquabis(2-methyl-6-oxo-1,6-dihydro-3,4'-bipyridine-5-carbonitrile)copper(II)]--sulfato] tetrahydrate]

C.-Y. Niu, A.-M. Ning, C.-L. Feng, Y.-L. Dang and C.-H. Kou

Abstract: In the title polymer, {[Cu(SO₄)(C₁₂H₉N₃O)₂(H₂O)₂]·4H₂O}_n, both the metal center and the sulfate anion are located on a twofold axis. The Cu^II ion is coordinated by two pyridyl N atoms from two symmetry-related organic ligands, two O atoms from two symmetry-related water molecules, and two O atoms from two symmetry-related sulfate anions, resulting in a distorted octahedral geometry. The sulfate anions act as ₂-bridges and connect metal ions, forming a one-dimensional chain along the b axis. The three-dimensional crystal structure is established through intermolecular N-HO and O-HO hydrogen bonds involving the organic ligands, sulfate anions, coordinated and uncoordinated water molecules, and through - interacting 2-pyridone rings, with centroid-centroid separations of ca 3.96 Å and tilt angles of ca 2.62°.

Online 26 November 2008

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