Studies on coordination behavior between rare earth chloride and alanine

Abstract

The solubility of the ternary system, SmCl3-Ala-H2O, at 25?was studied using a semimicro phase equilibrium method. There are two complexes [namely: Sm(Ala)2Cl3?H2O and Sm(Ala)3Cl3?H2O] formed in this system at 25? Twenty four solid complexes were synthesized for rare earth chloride with alanine, namely, RE(Ala)3Cl3?H2O (RE = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy), RE(Ala)2Cl3譶H2O (RE = La, Ce, Pr, Nd, Sm, n = 3; RE = Ho, Yb, Y, n = 4) and RE(Ala)Cl3?H2O(RE = Eu, Gd, Tb, Dy, Ho, Yb, Y). These complexes were characterized by chem. anal., IR, UV, x-ray diffraction and TG-DTG. The regularity for complex formation of rare earth chloride with alanine was found.

Key words: ULTRAVIOLET SPECTROPHOTOMETRY, PHASE EQUILIBRIUM, REACTION MECHANISM, INFRARED SPECTROPHOTOMETRY, X-RAY DIFFRACTION ANALYSIS, TERNARY SYSTEM, THERMAL STABILITY, ALANINE, EDTA TITRATION, COMPLEX REACTION

CLC Number:

O611.662

Cite this article

GAO SHENGLI;XUE HONGFU;ZHANG WANLONG;LIU XIAOJUN;REN DEHOU. Studies on coordination behavior between rare earth chloride and alanine[J]. Acta Chimica Sinica, 1994, 52(7): 693-698.

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