Studies on the Synthesis and Characterization and Bonding Specificity of Rare Earth ( Ⅲ) Complexes with Indole-3-Acetic Acid and Indole-3-butanoic Acid

Abstract

Abstract: Eight new solid complexes of rare earth ( Ⅲ ) with indole-3-butanoicacid and indole-3-bu-tanoic acid were synthesized in ethanol-water soluton. The new complexes have the composition Ln (IA)₃·2H₂Oand Ln(IB)₃·2H₂O(Ln = La,Nd,Sm,Er,IA = C₁₀H₈NO₂, IB = C₁₂H₁₂NO₂). The electronic spectra of the complexes were observed. The molar conductance data show that the complexes are non-electrolyte. IRspectra and XPSmeasurements indicate the unidentate coordination mode of carboxylate ions to rare earth (Ⅲ ) ion in Ln(IA)₃ · 2H₂Ocompounds and the bidentate coordination mode of carboxylate ions in Ln(IB)₃ · 2H₂Ocompounds, also show that nitrogen atoms in indole-3-acetates are coordinated, but nitrogen atoms in indole-3-butanoates are uncoordinated. The TG-DTAdata show that the complexes are all relatively stable thermally.

Key words: Rare earth, Indole-3-acetic acid, Indole-3-butanoic acid, Complexes

TrendMD:

Wang Zemin, Fu Chujin, Cao Jinrong, Lu Feng . Studies on the Synthesis and Characterization and Bonding Specificity of Rare Earth ( Ⅲ) Complexes with Indole-3-Acetic Acid and Indole-3-butanoic Acid[J]. Chem. J. Chinese Universities, 1990, 11(4): 345.

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