The Solubilities of La(ClO4)3-OCBAAP-H2O System(30 ℃) and Syntheses and Characterization of Ln(OCBAAP)4(ClO4)3·nH2O

Abstract

Abstract: The solubilities of ternary system La(ClO₄)₃-OCBAAP[4-(o-chlorobenzoyl) aminoantipyrine, C₁₈ H₁₆ N ₃O₂Cl]-H₂Oat 30 ℃ were determined. The new solid phase (incongruent compound), La(OCBAAP)₄(ClO₄)₃·6H₂O, was discovered in the system. Based on the solubility diagram, the synthesis condition was defined, and compounds Ln(OCBAAP)₄·(ClO₄)₃· n H₂O(Ln=La, n =6; Ln=Pr, Nd, Sm, Gd, Yb, n =2) were synthesized. The compounds were characterized by chemical analysis, elemental analysis, TG DTG, IRspectra and density respectively. Apparent activation energy of thermal decomposition of La(OCBAAP)₄(ClO₄)₃ has been calculated.

Key words: Ternary system, Solubility, Phase equilibrium, Lanthanum perchlorate, 4-(o-Chlorobenzoyl)aminoantipyrine

CLC Number:

O642.5

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LIANG Hong-Bin, TANG Zong-Xun . The Solubilities of La(ClO₄)₃-OCBAAP-H₂O System(30 ℃) and Syntheses and Characterization of Ln(OCBAAP)₄(ClO₄)₃·nH₂O[J]. Chem. J. Chinese Universities, 1998, 19(12): 1886.

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The Solubilities of La(ClO₄)₃-OCBAAP-H₂O System(30 ℃) and Syntheses and Characterization of Ln(OCBAAP)₄(ClO₄)₃·nH₂O

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