Kinetic studies on thiolato-ligand substitution reactions with halide ions of square-planar palladium(II) complex with bis(2-(diphenylphosphino)ethyl)phenylphosphine

Sen ichi Aizawa*, Yasushi Sone, Tatsuya Kawamoto, Shinkichi Yamada, Motoshi Nakamura

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

The square-planar thiolato palladium(II) complex with a terdentate phosphine bound ligand, [Pd(pt)(p3)](BF4) (p3=bis(2-(diphenylphosphino)ethyl)phenylphosphine, pt=1-propanethiolate) has been synthesized and characterized by 31P NMR spectroscopy. The solid state structure of [PdI(p3)]I was determined by an X-ray crystal structure analysis. The kinetic parameters for the thiolato-ligand substitution reactions with halide ions, [Pd(pt)(p3)]++X-→[PdX(p3)] ++pt- (X-=Cl-, Br-, I-), in chloroform were obtained as follows: k298=7.22, 1.68 and 10.1×10-4 s-1, ΔH=67±2, 56±2 and 63±3 kJ mol-1 and ΔS=-80±7, -128±6 and -92±11 J mol-1 K-1, respectively. These kinetic results are compared with those for the corresponding reactions of the trigonal-bipyramidal complex with an analogous phosphine bound ligand, [Pd(pt)(pp3)](BF4) (pp3=tris(2-(diphenylphosphino)ethyl)phosphine).

Original languageEnglish
Pages (from-to)235-239
Number of pages5
JournalInorganica Chimica Acta
Volume338
DOIs
StatePublished - 2002/10/14

Keywords

  • Reaction mechanism
  • Square-planar palladium(II) complexes
  • Substitution reaction
  • Thiolato complexes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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