摘要
本文研究了B15C5冠醚萃取锂盐时,不同阴离子对体系的同位素分离效应的影响。结果表明,阴离子在冠醚萃取过程中不仅对萃取络合物的稳定性有显著影响,而且阴离子半径及软度越大时,萃取体系的锂同位素分离系数(α_(LI))也越大。
The isotopic effect in the extraction of lithium by B15 C5(mono-benzo-15-crown-5) is reported in this paper.It is found that the anions have considerable effect onthe isotopic separation of lithium of the system.The bigger and softer the anions are,thehigher the isotopic separation coefficient of the solvent system will be.This phenomenoncan be explained by the nucleophilicity and the difference of the softness of anions.Themetal-crown interaction is hampered as the nucleophilicity of the anion is enhanced,andthe stability of the Li-complex is consequently decreased.
出处
《有机化学》
SCIE
CAS
1984年第3期217-220,共4页
Chinese Journal of Organic Chemistry
关键词
冠醚
锂同位素
同位素分离法
溶剂萃取
crown ether compounds
lithium isotopes
isotope separation
solvent extraction.
