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化学学报
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化学学报 ›› 1996, Vol. 54 ›› Issue (4): 347-350. 上一篇    下一篇

研究论文

四氮杂环十二烷铒配合物的合成及其晶体结构

王晓青;杨维春;金天柱;徐光宪;马ZHE生;施倪承   

  1. 北京大学化学系稀土化学研究中心;中国地质大学
  • 发布日期:1996-04-15

Synthesis and crystal structure of [Er(Cyclen)(CF3SO3)3(CH3CN)] complex

WANG XIAOQING;YANG WEICHUN;JIN TIANZHU;XU GUANGXIAN;MA;SHI NICHENG   

  • Published:1996-04-15

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460

被引次数

4 | 2

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)(CF3SO3)3(CH3CN)。用X射线衍射方法研究了其单晶结构。晶体属单斜晶系, P21/a空间群。晶胞参数为a=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。

关键词: 元素分析, 晶体结构, Ｘ射线衍射分析, 氮杂环化合物, 四园衍射仪, 铒络合物

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), =1.8027(4), c=0.8772(3)nm, β=97.64(3)°, V=2.7171(2)nm^3, Z=4. The central ion Er^3^+ 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 Er^3^+ 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.

Key words: ELEMENTAL ANALYSIS, CRYSTAL STRUCTURE, X-RAY DIFFRACTION ANALYSIS, NITROGEN HETEROCYCLICS, FOUR-CIRCLE DIFFRACTOMETER, ERBIUM COMPLEX

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