中华医学超声杂志

应用化学 ›› 1986, Vol. 0 ›› Issue (4): 35-41.

• 研究论文 • 上一篇    下一篇

硝酸铕18-C-6(4:3)络合物的晶体结构

樊玉国1, 于景生1, 吕品哲1, 金钟声2, 于凤兰2, 张树功2, 倪嘉缵2   

  1. 1. 吉林大学理论化学研究所;
    2. 中国科学院长春应用化学研究所
  • 收稿日期:1985-01-03 修回日期:1985-11-22 出版日期:1986-08-10 发布日期:1986-08-10
  • 通讯作者: 金钟声

CRYSTAL AND MOLECULAR STRUCTURE OF THE(4:3)CONPLEX BETWEEN EUROPIUM NITRATE AND18-CORWN-6

Fan Yuguo1, Yu Jingsheng1, Lu Pinzhe1, Jin Zhongsheng2, Yu Fenglan2, Zhang Shugong2, Ni Jiazuan2   

  1. 1. Jilin University, Changchun;
    2. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1985-01-03 Revised:1985-11-22 Published:1986-08-10 Online:1986-08-10

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摘要： 标题化合物的分子式为[Eu(NO3)6][Eu(NO3)2C12H24O6]3。晶体属单斜晶系,空间群为C2/m,a=28.772(6),b=11.142(2),c=12.024(2)Å,β=112.63(2)°,Z=2。对1167个可观察反射(I≥3σ(I)),用块矩阵最小二乘法精修所有的结构参数,最后的一致性因子R=0.063。结构分析表明:晶体学上有三个不同的离子,(1)[Eu(NO3)6]3-,(2)[Eu(NO3)2C12H24O6]+(有序)和(3)[Eu(NO3)2C12H24O6]+(无序)。前两个离子都具有C2h对称性。第三个离子是C1对称性,它有一个无序的冠醚环。在Fourier图上二个冠醚环叠加,它们的相互交错角为32°。

Abstract: The crystal and molecular structure of [Eu(NO3)3]4(C12H24O6)3 have been deter-mined from single-crystal x-ray diffraction data. The complex crystallizes in the mono-clinic space group C2/m with Z=2.Lattice parameters are:a=28.772(6), b=11.142(2), c=12.024(2)Å, β=112.63(2)°.The structure was solved by Patterson and Fou-rier techniques and refined by least-squares techniques to R=0.063 for 1667 reflec-tions. The structure contains three crystallographically distinct ions in the ratio 1:1:2:(1)[Eu(NO3)6]3- with C2h symmetry, (2)[Eu(NO3)2(C12H24O6)]+ with the same symmetry, (3)[Eu(NO3)2(C12H24O6)]+ with a disordered polyether on a C1 symmetry site.The two positions of the disordered polyether are staggered by 32°.

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