Catalytic properties of water-soluble rhodium and iridium complexes: The influence of the ligand structure

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26 Citations (Scopus)

Abstract

Rhodium and iridium complexes of trisulfonated triarylphosphanes, TPPTS (tris(3-sulfonatophenyl)phosphane), T(p-A)PTS (tris(3-sulfonato-4-methoxyphenyl) phosphane), T(2,4-X)TS (tris(2,4-dimethyl-5-sulfonatophenyl)phosphane), have been tested in biphasic hydrogenation of aldehydes. T(2,4-X)TS could not stabilize the rhodium complex under the applied conditions. Guanidium salt of T(2,4-X)TS has been characterized by X-ray crystallography, and Tolman cone angle of the phosphane has been determined from crystallographic data. The large cone angle (196°, 210°) explains the instability of the rhodium complex. Contrary to the T(2,4-X)TS/rhodium system, the T(2,4-X)TS/iridium catalyst has been found to be stable and effective in hydrogenation of benzaldehyde and caproaldehyde.

Original languageEnglish
Pages (from-to)3094-3098
Number of pages5
JournalInorganica Chimica Acta
Volume357
Issue number10
DOIs
Publication statusPublished - Jul 20 2004

Keywords

  • Aldehyde
  • Cone angle
  • Guanidium
  • Homogeneous hydrogenation
  • Iridium
  • Rhodium
  • Sulfonated phosphane
  • Water-soluble
  • X-ray analysis

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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