Novel diphosphine platinum cations: NMR and Mössbauer spectra and catalytic studies

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Abstract

The reaction of PtCl2(diphosphine) with mono and bidentate phosphines has been investigated by NMR spectroscopy. [Pt(diphosphine)(PMe3)2]2+, [Pt(diphosphine)2]2+ and [Pt((S,S)-bdpp)((S,S)-chiraphos)]2+ cations have been characterized by 31P NMR and conductivity measurements. The presence of tin(II) chloride promotes the formation of the complex cations. Evidence for coordination of the diphosphine in monodentate mode has been obtained by NMR spectroscopy. The platinum species possessing a platinum-tin bond and ionic complexes with an SnCl-3 counterion can easily be distinguished by 119Sn Mössbauer spectroscopy. Asymmetric hydroformylation of styrene with [Pt((S,S)-bdpp)2]2+ (SnCl-3)2 as catalyst precursor gave chemo-, regio-and enantio-selectivities different from those obtained with the covalent PtCl(SnCl3)((S,S)-bdpp) as catalyst precursor.

Original languageEnglish
Pages (from-to)75-80
Number of pages6
JournalJournal of Organometallic Chemistry
Volume507
Issue number1-2
DOIs
Publication statusPublished - Jan 25 1996

Keywords

  • Bidentate phosphine
  • Catalysis
  • Cations
  • Hydroformylation
  • Mössbauer spectra
  • Platinum

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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