A kinetic study on substitution reactions of tridentate ligands for acetylacetonate in bis(acetylacetonato)(tetrahydrofuran)dioxouranium(VI)

Jung Sung Kim, Seong Yun Kim, Yoon Yul Park, Hiroshi Tomiyasu, Yasuhisa Ikeda

Research output: Contribution to journalArticle

Abstract

Kinetics of substitution reactions of tridentate Schiff base ligands [N-(2-hydroxy-phenyl)salicylidenimine and its derivatives] for acac in UO2(acac)2thf (acac = acetylacetonate, thf = tetrahydrofuran) have been studied spectrophotometrically in thf. It was found that the reaction rates show the first-order dependence on the concentrations of Schiff base ligands and are accelerated with the addition of water to solvent. Apparent second-order rate constant (at 25 °C) and activation parameters (ΔH≠ and ΔS≠) are 7.52 M-1 s-1, 49.8 ± 3.2 kJ mol-1, and -61.0 ± 11.0 J K-1 mol-1, respectively. On the basis of these results, the reaction mechanisms will be discussed. (C) 2000 Elsevier Science S.A.

Original languageEnglish
Pages (from-to)199-203
Number of pages5
JournalInorganica Chimica Acta
Volume304
Issue number2
DOIs
Publication statusPublished - 2000 Jun 30
Externally publishedYes

Keywords

  • Acetylacetonato complexes
  • Dioxouranium complexes
  • Kinetics
  • Tridentate ligand complexes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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