Acta Cryst. (2004). E60, m1590-m1592  [ doi:10.1107/S1600536804024535 ]

-4,4'-Bipyridine-²N:N'-bis[triaqua(4,4'-bipyridine-²N,N')[1,3-phenylenedi(oxyacetato)-O]cobalt(II)] 4,4'-bipyridine heptahydrate

S. Gao, J.-W. Liu, L.-H. Huo, H. Zhao and S. W. Ng

Abstract: The reaction of cobalt(II) diacetate, disodium 1,3-phenyldi(oxyacetate) and 4,4'-bipyridine in water at neutral pH affords the title compound, [Co₂(C₁₀H₈O₆)₂(C₁₀H₈N₂)₃(H₂O)₆]·C₁₀H₈N₂·7H₂O. The dinuclear complex is generated from a unique half-molecule by twofold symmetry; it contains a bridging 4,4'-bipyridine molecule connected to two cobalt(II) atoms, each of which is covalently bonded to a carboxylate unit, another 4,4'-bipyridine molecule and three water molecules in octahedral geometry. The non-coordinated 4,4'-bipyridine molecule is stacked over the bridging 4,4'-bipyridine molecule at a separation of about 3.5  Å, and accepts hydrogen bonds at each N atom from coordinated water molecules.

Online 9 October 2004

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