Acta Cryst. (2004). E60, m1703-m1705  [ doi:10.1107/S1600536804025930 ]

catena-poly[[[tetraaquacobalt(II)]--4,4'-bipyridine-²N:N'] phthalate dihydrate]

C.-Z. Xie, B.-F. Zhang, X.-Q. Wang, G.-Q. Shen and D.-Z. Shen

Abstract: A polymeric cobalt complex, {[Co(C₁₀H₈N₂)(H₂O)₄](C₈H₄O₄)·2H₂O}_n, was synthesized and its crystal structure has been determined by X-ray diffraction. The complex exhibits a polymeric structure consisting of six-coordinated Co^II units linked via 4,4'-bipyridine (4,4'-bpy) to form a linear chain. The asymmetric unit contains only one half-molecule of the bridging ligand and two coordinated water molecules, the Co^II ion and the bridging ligand lying on a twofold rotation axis. Each cobalt(II) ion is in a distorted octahedral environment with a CoN₂O₄ core; 4,4'-bpy acts as a bridging ligand and four O atoms from coordinated water molecules act as terminal ligands. The chains are linked to (which also lie on twofold axes) uncoordinated phthalate anions and water molecules by extensive hydrogen bonds to form a three-dimensional supramolecular structure.

Online 30 October 2004

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