Acta Cryst. (2008). E64, m57  [ doi:10.1107/S1600536807062794 ]

Poly[[diaquanickel(II)]-₂-4,4'-bipyridine-²N:N'--p-phenylenedioxydiacetato-²O:O']

L. Zhu, H. Zhu and F. Sun

Abstract: The title coordination polymer, [Ni(C₁₀H₈O₆)(C₁₀H₈N₂)(H₂O)₂]_n, was obtained by the hydrothermal reaction of nickel(II) sulfate, benzene-1,4-dioxydiacetic acid (p-phenylenedioxydiacetic acid) and 4,4'-bipyridine (4,4'-bpy) in alkaline aqueous solution. Each Ni^II atom is coordinated by two O atoms from two benzene-1,4-dioxydiacetate ligands, two N atoms from two 4,4'-bpy ligands and two water molecules, and displays a distorted octahedral geometry. The Ni^II atom and benzene-1,4-dioxydiacetate and 4,4'-bpy moieties lie on inversion centres. The benzene-1,4-dioxydiacetate ligands bridge the Ni^II atoms to form infinite zigzag chains, which are further interconnected by 4,4'-bpy ligands to form a grid-like layer parallel to the (01) plane. Moreover, there are O-HO hydrogen-bonding interactions within the grid-like layer between the coordinated water molecules and the carboxylate O atoms.

Online 6 December 2007

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