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A novel one‐dimensional CoII coordination polymer: catena‐poly[[hexaaquacobalt(II)] [[diaquabis(sulfato‐κO)cobalt(II)]‐μ‐4,4′‐bipyridine‐κ2N:N′] [[triaqua(sulfato‐κO)cobalt(II)]‐μ‐4,4′‐bipyridine‐κ2N:N′]]

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The title compound, {[Co(H2O)6][Co(SO4)(C10H8N2)(H2O)3][Co(SO4)2(C10H8N2)(H2O)2]} n , contains three crystallographically unique CoII centres, all of which are in six‐coordinated environments. One CoII centre is coordinated by two bridging 4,4′‐bipyridine (4,4′‐bipy) ligands, one sulfate ion and three aqua ligands. The second CoII centre is surrounded by two N atoms of two 4,4′‐bipy ligands and four O atoms, i.e. two O atoms from two monodentate sulfate ions and two from water molecules. The third CoII centre forms part of a hexaaquacobalt(II) ion. In the crystal structure, there are two different one‐dimensional chains, one being anionic and the other neutral, and adjacent chains are arranged in a cross‐like fashion around the mid‐point of the 4,4′‐bipy ligands. The structure features O—H...O hydrogen‐bonding interactions between sulfate anions and water molecules, resulting in a three‐dimensional supramolecular network.
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Document Type: Research Article

Affiliations: Department of Applied Chemistry, Nanjing College of Chemical Technology, Nanjing 210048, People's Republic of China

Publication date: September 15, 2012

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