某些不对称的双偶氮变色酸衍生物和稀土元素的络合反应(Ⅱ)——助色团、溶剂和α型β型反应的关系

高等学校化学学报 ›› 1984, Vol. 5 ›› Issue (3): 311.

某些不对称的双偶氮变色酸衍生物和稀土元素的络合反应(Ⅱ)——助色团、溶剂和α型β型反应的关系

倪兆艾, 马永福

杭州大学

收稿日期:1982-10-15 修回日期:1983-08-30 出版日期:1984-06-24 发布日期:1984-06-24

THE COORDINATION REACTION OF SOME BISAZO DERIVATIVES OF CHROMOTROPIC ACID WITH RARE EARTH ELEMENTS(Ⅱ)——THE DISCUSSION ON THE RELATION BETWEEN THE AUXOCHROMES SOLVENTS AND α-TYPE β-TYPE REACTION

Ni Zhaoai, Ma Yongfu

Department of Chemistry, Hangzhou University, Hangzhou

Received:1982-10-15 Revised:1983-08-30 Online:1984-06-24 Published:1984-06-24

摘要/Abstract

摘要： 文章讨论了助色团、溶剂和α型β型反应的关系。指出只有含吸电子能力较强的助色团如—Cl,—NO₂,—COCH₃,—COOH等的变色酸衍生物能和稀土元素发生β型反应,而含助色团—SO₃H,—PO₃H₂—AsO₃H₂等的变色酸衍生物和稀土元素仅发生α型反应.含有助色团—COCH₃,—NO₂,—Cl的偶氮羧类、偶氮胂类、偶氮膦类的不对称变色酸试剂与稀土元素形成β型络合物,在一定实验条件下,在水溶液中的络合物能被异戍醇所萃取,而含助色团—SO₃H等的变色酸衍生物试剂的稀土络合物,则不能被萃取。同时指出乙醇丙酮等溶剂不仅能抑制β型络合物的形成,而且对于α型络合物来说,乙醇、丙酮等溶剂能大大提高反应的灵敏度。

Abstract: The relation between the auxochromes, solvents and a-type, β-type reaction was investigated in this paper. It shows that only the bisazo derivaties of chromotropic acid containing stronger electrophilic auxochromes such as -Cl, -NO₂, -COCH₃, -COOH can form β-type chelates with rare earth elements, and the auxochromes of -SO₃H, -PO₃H,-AsO₃H₂ only form in a-type.This paper points out that under proper conditions the bisazo derivatives which form β-type chelates can be extracted by isoamyl alcohol, but not the a-type.The formation of β-type chelates can be inhibited by some solvents such as ethyl alcohol and acetone. But these solvents can greatly raise the sensitivity of the a-type reaction.

TrendMD:

倪兆艾, 马永福. 某些不对称的双偶氮变色酸衍生物和稀土元素的络合反应(Ⅱ)——助色团、溶剂和α型β型反应的关系. 高等学校化学学报, 1984, 5(3): 311.

Ni Zhaoai, Ma Yongfu . THE COORDINATION REACTION OF SOME BISAZO DERIVATIVES OF CHROMOTROPIC ACID WITH RARE EARTH ELEMENTS(Ⅱ)——THE DISCUSSION ON THE RELATION BETWEEN THE AUXOCHROMES SOLVENTS AND α-TYPE β-TYPE REACTION. Chem. J. Chinese Universities, 1984, 5(3): 311.