Synthesis and thermal decomposition studies on rare earth dichloroacetate hydrates

Abstract

Ln(CHCl2CO2)3.nH2O (I; n = 2, Ln = La, Ce, Nd; n = 1.5, Ln = Sm; n = 1.25, Ln = Eu; n = 1, Ln = Gd) were prepared and characterized by chem. anal., thermogravimetry and dehydration over P2O5. The mechanism of thermal decomposition was studied by DTA, TG, and DTG techniques, chem. anal. and IR spectra. The thermal decomposition of I takes place at 25-600?through 3 major steps, viz. the hydrated salts dehydrate and are then decomposed to intermediates, Ln2(OH)Cl5.3H2O [Eu salt salt to Eu(OH)Cl5.2H2O], which are further decomposed to LnOCl (Ce salt to CeO2). The double-double effects in the lanthanide series were observed

Key words: REACTION MECHANISM, INFRARED SPECTROPHOTOMETRY, LANTHANUM COMPOUNDS, NEODYMIUM COMPOUNDS, HYDRATE, EUROPIUM COMPOUNDS, CERIUM COMPOUNDS, THERMOGRAVIMETRY, DIFFERENTIAL THERMAL ANALYSIS, RARE EARTH COMPOUNDS

CLC Number:

O612

Cite this article

XIONG WEIMIAO;WU SHURONG;MENG YAN. Synthesis and thermal decomposition studies on rare earth dichloroacetate hydrates[J]. Acta Chimica Sinica, 1987, 45(5): 426-431.

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