化学学报 ›› 2001, Vol. 59 ›› Issue (4): 533-537. 上一篇    下一篇

研究论文

硝酸镧-四氮杂-18-冠-6配合物的合成与结构

刘茹;朱文祥;张永安;延玺   

  1. 北京师范大学化学系.北京(100875)
  • 发布日期:2001-04-15

Synthesis and crystal structure of lanthanum (Ⅲ) nitrate complex with 1,10-dioxa-4,7,13,16-tetraaza -18-crown-6

Liu Ru;Zhu Wenxiang;Zhang Yongan;Yan Xi   

  1. Beijing Normal Univ., Dept of Chem..Beijing(100875)
  • Published:2001-04-15

合成了未见文献报道的1,10-二氧(4,7,13,16-四氮杂-18-C-6(以下用[18]N4O2代表)的硝酸镧配合物。并在丙酮中培养出{La[18]N4O2(NO3)3}·H2O配合物单晶,用X射线衍射法测定了晶体结构。晶体属三斜晶系,空间群P1,晶胞参数a=1.0690(2)nm,b=1.3608(3)nm,c=0.8230(2)nm,α=103.10(3)°,β=104.71(3)°,γ=84.03(3)°;Z=2,V=1.1265(4)mm^3,Dc=1.779g/cm^3,μ=1.968mm^-1,F(000)=608,R=0.0307,ωR=0.0566。冠醚环上的2个氧原子、4个氮原子均参与配位,3个硝酸根也均以双齿形式配位,中心La(Ⅲ)离子的配位数为12,配位多面体为畸变的二十面体,H2O分子存在于配位外界。

关键词: 硝酸镧, 氮杂环化合物, 晶体结构, 镧络合物, X射线衍射分析

A new lanthanum (Ⅲ) nitrate complex with 1,10-dioxa-4,7,13,16 tetraaza-18-crown-6([18]N4O2) was prepared. The single crystal structure of {La[18]N4O2(NO3)3}·H2O was determined by X-ray diffraction method. It belongs to triclinic crystal system, space group P1 with a=1.0690(2)nm,b=1.3608(3)nm, c=0.8230(2)nm,α=103.10(3) °,β=104.71(3)°,γ=84.03(3)° ;Z=2,V=1.1265(4)mm^3,Dc=1.779g/cm^3,μ =1.968mm^-1,F(000) =608,R=0.0307,ωR=0.0566. Lanthanum ion is coordinated to the oxygen and nitrogen atoms of the macrocycle and also to the nitrate anions. The coordination number is twelve. The coordination polyhedron of the complex is distorted icosahedron.

Key words: LANTHANUM NITRATE, NITROGEN HETEROCYCLICS, CRYSTAL STRUCTURE, LANTHANUM COMPLEX, X-RAY DIFFRACTION ANALYSIS

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