Acta Cryst. (2008). E64, m1358  [ doi:10.1107/S1600536808031619 ]

catena-Poly[[[bis[aquanickel(II)]bis(-pyridine-2,6-dicarboxylato N-oxide)]--1,2-di-4-pyridylethane] tetrahydrate]

M.-H. Yang

Abstract: In the title compound, {[Ni₂(C₇H₃NO₅)₂(C₁₂H₁₂N₂)(H₂O)₂]·4H₂O}_n, two Ni^II ions, two tridentate pyridine-2,6-dicarboxylate N-oxide ligands and two coordinated water molecules form centrosymmetric dinuclear units, which are further bridged by centrosymmetric 1,2-di-4-pyridylethane ligands into polymeric chains along [210]. Each Ni^II ion has a distorted square-pyramidal environment, with the basal plane formed by three O [Ni-O = 1.9290 (16)-1.9588 (10) Å] and one N [Ni-N = 1.9828 (18) Å] atoms and the apical position occupied by the water molecule [Ni-O = 2.2643 (11) Å]. The water molecules are involved in the formation of O-HO hydrogen bonds.

Online 4 October 2008

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