Synthesis, reaction and structure of a series of chromium(III) complexes containing oxalate ligand |
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| Authors: | Xu-Fang Chen Li Liu Jian-Gong Ma Long Yi Peng Cheng Dai-Zheng Liao Shi-Ping Yan Zong-Hui Jiang |
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| Institution: | Department of Chemistry, Nankai University, Tianjin 300071, People's Republic of China |
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| Abstract: | A series of chromium(III) complexes Cr(bipy)(HC2O4)2]Cl·3H2O (1), Cr(phen)(HC2O4)2]Cl·3H2O (2), Cr(phen)2(C2O4)]ClO4 (3), Cr2(bipy)4(C2O4)](SO4)·(bipy)0.5·H2O (4) and Mn(phen)2(H2O)2]2Cr(phen)(C2O4)2]3ClO4·14H2O (5) were synthesized (bipy=4,4′-bipyridine, phen=1,10-phenanthroline), while the crystal structures of 1 and 3–5 have been determined by X-ray analysis. 1 and 3 are mononuclear complexes, 4 contains binuclear chromium(III) ions and 5 is a 3D supromolecule formed by complicated hydrogen bonding. 1–3 are potential molecular bricks of chromium(III) building blocks for synthesis heterometallic complexes. When we use these molecular bricks as ligands to react with other metal salts, unexpected complexes 4 and 5 are isolated in water solution. The synthesis conditions and reaction results are also discussed. |
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| Keywords: | Crystal structures Cr(III) complexes Molecular bricks Oxalate ligand |
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