高等学校化学学报

高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (3): 226.

• 研究论文 • 上一篇    下一篇

稀土羧酸盐的结构研究(Ⅱ)—硝酸二(2-乙基己酸)二(乙醇)合钕的合成、表征及晶体结构

李俊然, 黄春辉, 李标国, 徐光宪   

  1. 北京大学稀土化学研究中心
  • 收稿日期:1988-06-08 出版日期:1990-03-24 发布日期:1990-03-24
  • 通讯作者: 黄春辉
  • 基金资助:

    国家自然科学基金

Structural Studies on Rare Earths Carboxylates( Ⅱ ) —Synthesis,Characterization and Structure Determination of Nitrate Di(2-Ethylhexanoate) Di(Ethyl Alcohol) Neodymium

Li Junran, Huang Chunhui, Li Biaoguo, Xu Guangxian   

  1. Research Centre of Rare Earth Chemistry, Peking University, Beijing
  • Received:1988-06-08 Online:1990-03-24 Published:1990-03-24

PDF (PC)

摘要： 合成了硝酸二(2-乙基己酸)二(乙醇)合钕配合物NdA2NO3(C2H5OH)2(A代表2-乙基己酸酸根)。晶体属三斜晶系,P1空间群,每一晶胞中有两个化学式单元,晶胞参数:a=9.448(4)Å,b=12.146(4)Å,c=12.974(5)Å,α=71.56(3)°,β=98.45(3)°,γ=98.62(3)°,V=1388.6(9)Å3,Z=2。晶体中钕原子之间由两个羧基桥联,形成链状多聚分子。钕的配位数为8,配合物为畸变的三角十二面体构型。

关键词: 钕, 2-乙基己酸, 配合物, 三斜晶系, P1空间群

Abstract: The synthesis, the crystal and molecular structure of neodymium complex NdA2NO3(C2H5OH)2(A= 2-ethyl hexanoate group) are presented in this report. The crystal and molecular structures were determined by single crystal X-ray diffraction techniques with a four circle diffrac-tometer to give a final Rvalue of 0. 0997. The crystal is triclinic with a space group P1. The unit cell parameters are:a = 9. 448(4)Å, b= 12. 146(4)Å, c= 12. 974(5)Å, a=71. 56(3)°, β = 98.45(3)°, γ=98.62(3)°, V=1388.6(9) Å3, Z = 2, dcalc=1. 397 g/cm3. Each two neodymium atoms in crystal are connected with two bridging carboxyl groups to form a chain polymeric molecule. The middle point of the linking line of two neodymium atoms is on the axis a. In addition, every neodymium is coordinated by 4 oxygen atoms. Two of them are from a bidentate nitrate, and the others from two ethyl alcohol molecules. The coordination number of neodymium is 8 and the coordination polyhedron of neodymium takes an arrangement of a distorted delta dodecahedron.

Key words: Neodymium, 2-ethyl hexanoate, Complex, Triclinic crystal system, Space group P1

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