| SYNTHESIS OF ACIDIC PHOSPHATES AND PHOSPHONATES AND THEIR STRUCTURE-REACTIVITY STUDIES ON THE EXTRACTION OF NEODYMIUM, SAMARIUM,YTTERBIUM AND YTTERIUM |
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| 作者姓名： | 袁承业 叶伟贞 马恒励 王国梁 龙海燕 谢继发 秦秀清 周永昌 |
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| 作者单位： | Shanghai Institute of Organic Chemistry，Academia Sinica，Shanghai Institute of Organic Chemistry，Academia Sinica，Shanghai Institute of Organic Chemistry，Academia Sinica，Shanghai Institute of Organic Chemistry，Academia Sinica，Shanghai Institute of Organic Chemistry，Academia Sinica，Shanghai Institute of Organic Chemistry，Academia Sinica，Shanghai Institute of Organic Chemistry，Academia Sinica，Shanghai Institute of Organic Chemistry，Academia Sinica |
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| 摘 要： | Methods for the synthesis of five types of acidic phosphates, phosphonates as well asohosphinates have been deseribed. The mechanism of extrastion of rare earth of these com-pounds is examined. A free energy relationship existed in plotting equilibrium constantsagainst either pKa or ∑σ values of the acidic organophosphorus compounds under investiga-tion. Steric effects play an important role in these extrastion systems as expected. Thereactivity-selectivity principles in solvent extraction proposed by our laboratory are well de-monstrated in extraction of rare earth by acidic phosphorus--based ligands.
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