Acta Chimica Sinica ›› 2001, Vol. 59 ›› Issue (4): 533-537. Previous Articles     Next Articles

Original Articles

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)
  • 出版日期:2001-04-15 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)
  • Online:2001-04-15 Published:2001-04-15

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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