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

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。

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,Cu^2＋ 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.