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Bis(μ‐5‐carboxybenzene‐1,3‐dicarboxylato‐κ

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The title compound, [Zn2(C9H4O6)2(C6H6N4)2], consists of two ZnII ions, two 5‐carboxybenzene‐1,3‐dicarboxylate (Hbtc2−) dianions and two 2,2′‐bi‐1H‐imidazole (bimz) molecules. The ZnII centre is coordinated by two carboxylate O atoms from two Hbtc2− ligands and by two imidazole N atoms of a bimz ligand, in a distorted tetrahedral coordination geometry. Two neighbouring ZnII ions are bridged by a pair of Hbtc2− ligands, forming a discrete binuclear [Zn2(Hbtc)2(bimz)2] structure lying across an inversion centre. Hydrogen bonds between carboxyl H atoms and carboxylate O atoms and between imidazole H atoms and carboxylate O atoms link the binuclear units. These binuclear units are further extended into a three‐dimensional supramolecular structure through extensive O—H...O and N—H...O hydrogen bonds. Moreover, the three‐dimensional nature of the crystal packing is reinforced by the π–π stacking. The title compound exhibits photoluminescence in the solid state, with an emission maximum at 415 nm.
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Document Type: Research Article

Affiliations: College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, People's Republic of China

Publication date: September 15, 2011

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