Abstract
Four oxalate-bridged transition-metal supramolecular compounds [Co 2(im) 4(ox) 2] 1, [Co(im) 2(ox)] 2, [Mn(2,2′-bpy)(ox)] 3 and [Fe(H 2O) 2(ox)] 4 (im, imidazole; ox, oxalate; bpy, bipyridine) were obtained from the simple hydrothermal reactions of M n+ ox L (M, transition metal; L, aromatic N-donor ligand) system. They all exhibit the 1-D chain structures, consisting of the ML 2 2 + (or ML 2+) 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 ML 2 2 + 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.
Published Version
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