Bridging of trigoldsulfonium clusters by a silver(I) ion

Alexander Sladek, Hubert Schmidbaur

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Treatment of tris[(triphenylphosphine)gold(I)]-sulfonium tetrafluoroborate with AgBF4 (molar ratio 2:1) in tetrahydrofuran affords a heptanuclear mixed-metal cluster trication {[(Ph3P)6Au6AgS2](tht)}3+ as the tetrafluoroborate salt. The crystal structure of the compound has been determined by X-ray diffraction. The silver atom is found in a bridging position between the two Au3S units with short contacts to both sulfur atoms and to three out of six gold atoms. The coordination sphere of the silver atom is complemented by a tetrahydrofuran molecule. In di(tri)chloromethane solutions there is rapid site exchange of the silver coordination as shown by virtual equivalence of the phosphine ligands on the NMR time scale at ambient temperature.

Original languageEnglish
Pages (from-to)301-303
Number of pages3
JournalZeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
Volume52
Issue number2
DOIs
StatePublished - Feb 1997
Externally publishedYes

Keywords

  • Gold clusters
  • Mixed gold/silver cluster
  • Silver bridging
  • Sulfonium cations

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