四氮杂环十二烷铒配合物的合成及其晶体结构  

Synthesis and Crystal Structure of [Er(Cyclen)(CF_3SO_3)_3(CH_3CN)] Complex

作　　者：王晓青[1] 杨维春[1] 金天柱[1] 徐光宪 马喆生[2] 施倪承[2] 

机构地区：[1]北京大学稀土化学研究中心,北京100871 [2]中国地质大学,北京100083

出　　处：《化学学报》1996年第4期347-350,共4页Acta Chimica Sinica

基　　金：国家自然科学基金资助的课题

摘　　要：氮气保护下,在无水乙腈中合成了1,4,7,10-四氮杂环十二烷(Cyclen)与稀土铒的配合物并得到浅红色棱柱状晶体.元素分析结果表明该配合物的组成为Er(Cyclen)(CF_3SO_3)_3(CH_3CN).用X射线衍射方法测定了其单晶结构.晶体属单斜晶系,P2_1/α空间群.晶胞参数为α=1.7335(4),b=1.8027(4),c=0.8772(3)nm,β=97.64(3)°,V=2.7171(2)nm^3,Z=4.其中铒为八配位,形成四方反棱柱型配位多面体.The title complex has been synthesized in acetonitrilesolution under N2 protection, and its crystal structure has been determined by X - ray diffraction method. The crystal belongs to monoclinic space group P21/a . The cell parameters are a = 1. 7335(4) , b = 1. 8027(4) , c =0.8772(3)nm, β = 97.64(3)°V = 2.7171 (2)nm3,Z = 4.The central ion Er3+ is coordinated by four nitrogen atoms from 1,4, 7,10 - tetraazacyclododecane(Cyclen) , three oxygen atoms of three CF3SO3- and a nitrogen atom of a acetonitrile molecule. The coordination number is eight and the complex takes a coordination polyhedron of square antiprism. The bonds between Er3+ and O is much stronger than Er - N(Cyclen) and Er - N(acetonitrile) , and their average bond lengths are 0.2316nm, 0.2468nm and 0.2510nm, respectively.

关 键 词：氮杂大环 铒配合物 晶体结构 

分 类 号：O614.344[理学—无机化学]