Acta Cryst. (2009). E65, m1207  [ doi:10.1107/S1600536809035910 ]

Tetraaqua(2,2'-bipyridine-5,5'-dicarboxylato-²N,N')nickel(II) dihydrate

H. Yang

Abstract: In the title compound, [Ni(C₁₂H₆N₂O₄)(H₂O)₄]·2H₂O, obtained from a basic solution of 2,2'-bipyridine-5,5'-dicarboxylate and nickel(II) chloride in water, the central Ni(II) cation (site symmetry 2) is coordinated by two N atoms from the 2,2'-bipyridine-5,5'-dicarboxylate ligand and four aqua O atoms. The N-Ni-N angle is 78.64 (8)°. Weak but significant - stacking interactions exist between the pyridine rings with a centroid-centroid distance of 3.652 (8) Å. In addition, four O atoms of the two carboxyl groups form hydrogen bonds with both coordinated and uncoordinated water molecules, forming an infinite three-dimensional network.

Online 12 September 2009

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