双大环配体与铜双核配合物的合成、晶体结构和磁偶合性质  

Synthesis,Crystal Structure and Magnetic Properties of A New Dicopper(II) Complex with a Bis(macrocyclic) Ligand

作　　者：卜显和[1] 陈巍[1] 张若桦[1] 陈荣悌[1] 

机构地区：[1]南开大学化学系,天津300071

出　　处：《化学学报》1999年第6期627-634,共8页Acta Chimica Sinica

基　　金：国家自然科学基金(29771022);教育部(原国家教委)跨世纪优秀人才基金;天津市科学基金资助项目

摘　　要：由新型双功能配体2,6-双(1,5,9-三氮杂环十二烷)-2,6-二甲基苯甲酸(L)与溴化铜在甲醇中反应得到新型铜双核配合物[Cu_2LBr_2]Br·3H_2O单晶.晶体结构分析表明:2个Cu(Ⅱ)中心离子由配体L中的羧酸基团桥联;2个等价的Cu(Ⅱ)中心离子均由双功能配体L的1,5,9-三氮杂环十二烷([12]aneN_3)的3个氮原子和羧酸的1个氧原子及 1个Br^-离子配位,并都处在三角双锥的配位环境中;分子内Cu…Cu双核间的距离为0.5884(6)nm.变温磁化率数据表明:在同一分子中的2个铜核之间存在反铁磁偶合作用(J=-22.49cm^(-1)).A new binuclear copper( II ) complex, [Cu2LBr2]Br·3H2O, where L is a new binucleating macrocyclic ligand 2, 6-bis (1,5, 9-triazacyclododecan-9-ylmethyl) benzoate, has been prepared and characterized by X-ray crystallography. Crystal data: monoclinic, space group P21/c, a = 1.1666(2) , b= 1.3541(3), c = 2. 2750(5) nm, β = 99. 38(3)°, Z =4. The binuclear copper( II ) center ions arebridged by a u-carboxyl group of L and separated by 0.5884nm. Both of the copper( II ) ion centers are coordinated by three amine nitrogens of [12]aneN3 subunit and one oxygen of the carboxyl group,as well as one bromide ion.The copper( II ) ion is in the trigonal bipyramid environment. Variable temperature magnetic susceptibility studies indicate that there exists intramolecular antiferro - magnetic coupling ( J = - 22.49cm-1 ) between the two copper( II ) centers.

关 键 词：双核铜配合物 晶体结构 反铁磁偶合 铜配合物 

分 类 号：O614.121[理学—无机化学]