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catena‐Poly[[di‐μ2‐aqua‐hexaaquabis(μ3‐4‐oxidopyridine‐2,6‐dicarboxylato)trimanganese(II)] trihydrate]: a new one‐dimensional coordination polymer based on a trinuclear MnII complex of chelidamic acid

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4‐Hydroxypyridine‐2,6‐dicarboxylic acid (chelidamic acid, hypydc[H]H2) reacts with MnCl2·2H2O in the presence of piperazine in water to afford the title complex, {[Mn3(C7H2NO5)2(H2O)8]·3H2O} n or {[Mn3(hypydc)2(H2O)8]·3H2O} n . This compound is a one‐dimensional coordination polymer, with the twofold symmetric repeat unit containing three metal centres. Two different coordination geometries are observed for the two independent MnII metal centres, viz. a distorted pentagonal bipyramid and a distorted octahedron. The 4‐oxidopyridine‐2,6‐dicarboxylate anions and two of the water molecules act as bridging ligands. The zigzag‐like geometry of the coordination polymer is stabilized by hydrogen bonds. O—H...O and C—H...O hydrogen bonds and water clusters consolidate the three‐dimensional network structure.
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Document Type: Research Article

Publication date: October 15, 2013

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