高等学校化学学报

高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (1): 46.

• 研究论文 • 上一篇    下一篇

1:2型硝酸铀酰二苯并-18-冠-6氢键夹心式配合物的晶体结构

甘新民, 唐宁, 王欣, 祝英, 谭民裕   

  1. 兰州大学化学系
  • 收稿日期:1988-04-06 出版日期:1990-01-24 发布日期:1990-01-24
  • 通讯作者: 谭民裕
  • 基金资助:

    国家教育委员会科学基金

The Crystal Structure of [UO2(NO3)2(H2O)2]·(DB18C6)2

Gan Xinmin, Tang Ning, Wang Xin, Zhu Ying, Tan Minyu   

  1. Department of Chemistry, Lanzhou University, Lanzhou
  • Received:1988-04-06 Online:1990-01-24 Published:1990-01-24

PDF (PC)

被引次数

2

摘要： 化合物[UO2(NO3)2(H2O)2]·(DB18C6)2晶体属单斜晶系,空间群为P21/k。晶体学参数:a=11.782(2)Å,b=8.584(2)Å,c=22.631(2),β=98.29(2)Å°,Z=2.用3024个I≥3σ(I)的三维X射线独立衍射数据进行结构解析,最终的R=0.066。结构分析表明,两个双齿配体硝酸根及两个水分子配位于线型铀酰离子的赤道平面上,铀的配位数是8,配位几何构型为稍有扭曲的六方双锥。配位水分子的4个氢原子分别与上下两层冠醚环上的氧原子生成氢键。形成夹心式分子缔合物。

关键词: 硝酸铀酰, 二苯并-18-冠-6, 配合物, 晶体结构

Abstract: The crystal and molecular structure of the title compound was determined by single crystal X-ray diffraction. The complex crystal belongs to a monoclinic, space group P21/n with Z=2. Lattice parameters are: a=11.782(2)Å, b=8.584(2)Å, c=22. 631(2)Å,β=98.29(2)°, V= 2265.1 Å3. The structure was analyzed by Patterson and Fourier techniques and refined by full-matrix least-squares to R=0. 066 for 3024 reflections. The uranyl group is not located within the crown ether. Rather, the structure consists of neutral UO2(NO3)2(H2O)2 units and separate crown ether molecules connected by hydrogen bonding through coordinate water molecules. The oxygen atoms of the linear uranyl group are coordinated only to uranium; the eight-coordination of uranium is completed by six equatorial oxygen donors, two from water and four from bidentate nitrate groups. Each uranium is coordinated in a slight distorted hexagonal bipyramid configuration.

Key words: Uranyl nitrate, Dibenzo-18-crown-6, Complex, Crystal structure

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