THERMODYNAMICS OF AM3+-SUBSTITUTED PYRAZOLONE-CROWN ETHER ADDUCTS

被引：20

作者：

MATHUR, JN

机构：

[1] Radiochemistry Division, Bhabha Atomic Research Centre, Bombay, -400 085, Trombay

来源：

SOLVENT EXTRACTION AND ION EXCHANGE | 1990年 / 8卷 / 4-5期

关键词：

D O I：

10.1080/07366299008918021

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The thermodynamic parameters for the extraction of Am3+ with pyrazolones (HA-HPMBP or HPMTFP) alone as well as their mixtures with one of the crown ethers B15C5 or DCH18C6 have been calculated in chloroform at 30°C using temperature coefficient method. The selfadduct species Am(A)3.HA is enthalpy stabilized. The adduct species Am(A)3.HA.DCH18C6 are stabilized by entropy and opposed by enthalpy. The adduct species Am(A)3.HA.B15C5 (HA-HPMBP) and Am(A)3.B15C5 or Am(A)3; 2B15C5 (HA-HPMTFP) are stabilized by enthalpy. These data have been correlated with the difference in the nature of binding of the two crown ethers with Am3+. © 1990, Taylor & Francis Group, LLC. All rights reserved.

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页码：629 / 641

页数：13

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