Acta Cryst. (2008). E64, m1278-m1279  [ doi:10.1107/S1600536808029206 ]

Poly[[diaqua(₂-4,4'-dipyridyl sulfide-²N:N')(4,4'-dipyridyl sulfide-N)(2-hydroxy-5-sulfonatobenzoato-O¹)nickel(II)] dihydrate]

Z.-X. Du and J.-X. Li

Abstract: The asymmetric unit of the title helical coordination polymer, {[Ni(C₇H₄O₆S)(C₁₀H₈N₂S)₂(H₂O)₂]·2H₂O}_n, is comprised of an Ni^II ion, one 5-sulfosalicylic acid dianion (HSSA), two 4,4'-dipyridylsulfide (4,4'-dps) ligands, and two coordinated and two uncoordinated water molecules. The Ni^II ion is coordinated by two water molecules, one carboxylate O atom of the HSSA dianion and three N atoms from three 4,4'-dps ligands in a distorted octahedral environment. Half of the 4,4'-dps ligands are ₂-bridging ligands which link adjacent Ni^II centers, forming a one-dimensional helical structure along the b axis. This helical structure is further stabilized by O-HO intra- and intermolecular hydrogen bonds.

Online 20 September 2008

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