Acta Phys. -Chim. Sin. ›› 2004, Vol. 20 ›› Issue (09): 1144-1149.doi: 10.3866/PKU.WHXB20040917

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Thermochemistry of Salicylaldehyde-1H-benzotriazol Acetyl Hydrazone Complexes with RE (III)

Wu Wang-Ting;Yang Rui;Hu Ting;Peng Ke;He Shui-Yang;Hu Rong-Zu   

  1. Department of Chemistry, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, Northwest University, Xi′an　710069
  • Received:2004-03-05 Revised:2004-05-18 Published:2004-09-15
  • Contact: He Shui-Yang E-mail:xdhsy@263.net

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Abstract: Six new rare earth complexes of salicylaldehyde-1H-benzotriazol acetyl hydrazone(C15H13N5O2, SBTH)have been synthesized in methanol. The formulae RE(HL)2ClO4 (RE=Pr, Nd, Sm, Eu, Gd, Tb; HL=C15H12N5O2)were determined by elemental analysis and EDTA volumetric analysis, molar conductivity, IR and 1H NMR. The TG-DTG, DSC were carried out to study the thermodecomposition process and the decomposition enthalpies of the main steps of the complexes were obtained. The apparent activation energies of the main steps were calculated by the Kissinger′s method and Ozawa′s method. The dissolution enthalpies of the complexes were measured in DMF.

Key words: Salicylaldehyde-1H-benzotriazol acetyl hydrazone, Rare earth complexes, Decomposition enthalpy, Activation energies, Enthalpy of dissolution