N-苯基亚氨基二乙酸桥联的双核铜配合物的合成、表征与晶体结构 |
Synthesis, Characterization and Crystal Structure of Dinuclear Cu(Ⅱ) Complexes Linked by N-phenyliminodiacetic Acid |
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摘要: 由Cu(Ⅱ)、2,2′-联吡啶(邻菲咯啉)与N-苯基亚氨基二乙酸在溶液中组装得到2个双核配合物[Cu2(L)2(2,2′-bipy)2]·8H2O (1)、[Cu2(L)2(phen)2]·2H2O (2)(H2L=N-苯基亚氨基二乙酸,2,2′-bipy=2,2′-联吡啶,phen=邻菲咯啉)。用元素分析、红外光谱、热重分析等进行了表征,并测定了其晶体结构。晶体结构表明,配合物1的晶体属三斜晶系,空间群P1;配合物2的晶体属单斜晶系,空间群P21/c。在这2个双核配合物中,中心铜离子的配位形式均为五配位的畸变四方锥构型,配体L中的N原子没有参与配位,而是采用1个羧基的1个氧原子与Cu2+离子螯合、另1个羧基上的1个氧原子以μ2-桥联的配位模式连接2个Cu2+离子。 |
关键词: 双核铜配合物 N-苯基亚氨基二乙酸 晶体结构 |
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Abstract: Two dinuclear complexes of [Cu2(L)2(2,2′-bipy)2]·8H2O (1), [Cu2(L)2(phen)2]·2H2O (2) (H2L=N-phenyli-minodiacetic acid)were synthesized by reaction of 2,2′-bipy or phen, N-phenyliminodiacetic acid with copper nitrate in water-ethanol solution. The complexes were characterized by elemental analysis, IR spectra, TG and X-ray diffraction. Complex 1 crystallizes in the triclinic with space group P1. Complex 2 crystallizes in the monoclic with space group P21/c. In the two complexes, Cu2+ ions are both five-coordinated in a distorted tetragonal pyramidal. In additional, a new coordination mode of ligand L is found, which N atom is not connected with central ion, one O atom of one carboxylic acid is chelated to Cu ion simply, but one O atom of the other carboxylic acid is bridged to two Cu ions as μ2 monodentate mode. CCDC: 650385,1; 650386,2. |
Keywords: dinuclear copper complex N-phenyliminodiacetic acid crystal structure |
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郝志峰,余 坚,张耀方,陈耀文,余 林.N-苯基亚氨基二乙酸桥联的双核铜配合物的合成、表征与晶体结构[J].无机化学学报,2007,23(8):1315-1321. |
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