NMR investigation of platinum-diphosphine complexes in [BMIM][PF 6] ionic liquid

Gábor Rangits, György Petocz, Zoltán Berente, László Kollár

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18 Citations (Scopus)

Abstract

The formation of platinum-diphosphine complexes of catalytic importance was investigated in [BMIM][PF6] (BMIM=butyl-methyl-imidazolium cation) ionic liquid by NMR for the first time. Both the PtCl(SnCl 3)(bdpp) and Pt(SnCl3)2(bdpp) complexes (where bdpp=2,4-bis(diphenylphosphino)pentane) were identified in the insertion reaction of tin(II)chloride into the Pt-Cl bond of PtCl2(bdpp) complex. The addition of PPh3 to PtCl2(bdpp) resulted in the formation of [Pt(bdpp)(PPh3)Cl]+ complex cation as a minor component, which turned to be a major component in the presence of tin(II)chloride while it forms trichlorostannate counterion. Both types of reactions show high similarity with those obtained in conventional organic solvents. As a serious disadvantage of the use of [BMIM][PF6] as ionic liquid, the partial decomposition of the hexafluorophosphate counterion in the presence of the smallest amount of water (and tin(II)chloride) is also discussed.

Original languageEnglish
Pages (from-to)301-305
Number of pages5
JournalInorganica Chimica Acta
Volume353
DOIs
Publication statusPublished - Sep 8 2003

Keywords

  • Ionic liquid
  • Ligand exchange
  • Nuclear magnetic resonance
  • Phosphine
  • Platinum

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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