Ligand properties of tri(2-thienyl)- and tri(2-furyl)phosphine and -arsine (2-C4H3E)3P/As (E = O, S) in gold(I) complexes

Uwe Monkowius, Stefan Nogai, Hubert Schmidbaur

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31 Scopus citations

Abstract

Tri(2-thienyl)- and tri(2-furyl)phosphine and -arsine (L) have been introduced as ligands to gold(I) chloride and acetate (AuX). Structural studies have shown that in the 1:1 complexes of the type L-Au-X the gold atoms are bound exclusively to the phosphorus/arsenic centers without any intra- or intermolecular approach of the donor atoms of the three heterocycles towards the metal atoms. Intermolecular aurophilic bonding is found in the crystals of the [tri(thienyl)phosphine]gold acetate complex, but is absent in crystals of the chloride complexes. The phosphines L have been quaternized with methyl iodide and the resulting phosphonium salts [LMe]I structurally characterized to provide reference data as to the preferred configurational and conformational motifs. The mass spectra of the gold complexes indicate a high stability of the dinuclear cationic species [(LAu)2X]+ with X = Cl, OAc for all ligands L.

Original languageEnglish
Pages (from-to)751-758
Number of pages8
JournalZeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
Volume58
Issue number8
DOIs
StatePublished - 1 Aug 2003
Externally publishedYes

Keywords

  • Arsines
  • Furylphosphines/arsines
  • Gold Complexes
  • Heteroarylphosphines/arsines
  • Phosphines
  • Thienylphosphines/arsine

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