Synthesis,characterization and crystal structure of ternary chloroacetate,dichloroacetate and trichloroacetate copper(II) complexes |
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| Authors: | Shi Qian Cao Rong Hong Mao Chun Wang Yao Yu Shi Qi Zhen |
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| Affiliation: | (1) State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P.R. China;(2) Department of Chemistry, Northwest University, Xian, 710069, P.R. China |
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| Abstract: | Three binuclear ternary copper(II) chloroacetate complexes with OP(OMe)3 were prepared, and the configurations of the copper(II) dichloroacetate and trichloroacetate complexes were converted from a square-planar structure into a binuclear cage structure during the reaction. The crystal structure of Cu2(ClCH2CO2)4[OP(OMe)3]2 were determined by single-crystal X-ray diffraction. The i.r. spectra show that the carboxylate groups behave as bridging bidentate ligands in Cu2(ClCH2CO2)4(H2O)2(1), Cu2(ClCH2CO2)4[OP(OMe)3]2(4), Cu2(Cl2CHCO2)4-[OP(OMe)3]2(5) and Cu2(Cl3CCO2)4[OP(OMe)3]2(6), and as monodentate ligands in Cu(Cl2CHCO2)2(H2O)2(2) and Cu(Cl3CCO2)2(H2O)2(3). The electronic reflectance spectra in the solid state suggest a square pyramidal coordination environment around the copper(II) atom in (1), (4), (5) and (6), and a square-planar coordination environment in (2) and (3). Room temperature X-band e.s.r. spectra of powdered samples studied indicate the presence of electron coupling of copper(II) ions in (1), (4), (5) and (6). |
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