Structure characterization of several oxalate-bridged transition-metal coordination polymers |
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Authors: | Jie-Hui Yu Qin Hou Ming-Hui Bi Zheng-Liang Lü Xiao Zhang Xue-Jian Qu Jing Lu Ji-Qing Xu |
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Institution: | aCollege of Chemistry and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130023, PR China |
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Abstract: | Four oxalate-bridged transition-metal supramolecular compounds Co2(im)4(ox)2] 1, Co(im)2(ox)] 2, Mn(2,2′-bpy)(ox)] 3 and Fe(H2O)2(ox)] 4 (im, imidazole; ox, oxalate; bpy, bipyridine) were obtained from the simple hydrothermal reactions of Mn+oxL (M, transition metal; L, aromatic N-donor ligand) system. They all exhibit the 1-D chain structures, consisting of the (or ML2+) units linked by oxalate bridges. Interestingly, the 1-D oxalate chains in the title compounds are further self-assembled into the 3-D supramolecular networks through the interchain various secondary bonding interactions. Because the units adopt the different configuration, the oxalate chains show either zigzag type as in compounds 1–3 or linear type as in compound 4. Compounds 1 and 2 are isomeric, and only in packing modes of interchain im molecules there exists the difference. |
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Keywords: | Oxalate Aromatic N-donor ligand Molecular structure Hydrothermal synthesis |
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