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Citation: Dong Wenkui, Lu Airu, Zhang Lianxiang. Preparation and Characterization of Complexes of 4'-Bromo-5'-Nitrobenzo-15-Crown-5 with Rare Earth(Ⅲ)[J]. Chinese Journal of Applied Chemistry, ;1995, 12(3): 13-17. shu

Preparation and Characterization of Complexes of 4'-Bromo-5'-Nitrobenzo-15-Crown-5 with Rare Earth(Ⅲ)

1.
Department of Environmental Engineering, Lanzhou Railway Institute Lanzhou 730070;
2.
Department of Chemistry, Northwestern Normal University, Lanzhou 730070

Received Date: 15 September 1994
Revised Date: 13 December 1994

The complexes of 4'-bromo-5'-nitrobenzo-15-crown-5(L) with rare earth have been synthesized and characterized by elemental analysis, IR, UV, TG-DTA, molar conduc-tance and X-ray powder diffration analyses. The complexes have compositions of RE(NO₃)₃·L(RE=La~Nd), Sm(NO₃)₃·L·H₂O and Eu(NO₃)₃·L·CH₃CN·4H₂O respectively with the coordination number of the rare earth cation in the complexes for La,Ce,Pr,and Nd being eleven. In the complexes with samarium and europium the crown ethers are coordi-nated with Sm³⁺ or Eu³⁺ via water molecules.
- light rare earth,
- crown ether complex,
- bromonitrobenzo crown,
- preparation
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