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A binuclear zinc polymer with paddlewheel building units and intersecting helical chains based on a flexible 4‐[(carboxymethyl)sulfanyl]benzoic acid ligand

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The asymmetric unit of the title compound, poly[{μ4‐4‐[(carboxylatomethyl)sulfanyl]benzoato}(N,N‐dimethylformamide)zinc], [Zn(C9H6O4S)(C3H7NO)] n , consists of one crystallographically independent ZnII cation, one 4‐[(carboxylatomethyl)sulfanyl]benzoate (L 2−) ligand and one coordinated dimethylformamide (DMF) molecule. The zinc ion is coordinated by five O atoms from four separate L 2− ligands and one DMF molecule, and the ZnO5 unit displays a distorted square‐based‐pyramidal geometry. Two ZnO5 units form a binuclear zinc–tetracarboxylate paddlewheel cluster, and these are bridged by L 2− ligands to generate an intersecting helical chain (Zn2+ ions as nodes), which is composed of right‐handed (P) and left‐handed (M) helices. Weak C—H...O hydrogen bonds extend the one‐dimensional coordinated chain into a weakly bound three‐dimensional supramolecular architecture.
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Document Type: Research Article

Publication date: October 15, 2011

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