Hyper-Coordinate phosphorus atoms in a golden hour-glass

H. Schmidbaur, H. Beruda, E. Zeller

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Treatment of phosphine, PH3, or bis(piva1oy1)phosphine, (t BuCO)2PH, with (tris[(triphenylphosphine)gold]oxonium) tetraf1uoroborate (Ph3PAu)30* BF4" in tetrahydrofuran at -60°C affords small amounts of a tricationic nona-nuclear gold complex (Au[P(AuPPh3)4]2)3+ (BF4-)3. The low temperature (1 H) 31 P NMR spectra of this product exhibit an (A4M)2 spin system indicating a highly symmetrical species of or D4h symmetry in solution. The structure, resembling a golden hour-glass, has been confirmed by an X-ray diffraction analysis of single crystals (tetragonal space group 14/mmm, Z = 2, a = 16.878(2), c = 30.320(3) Å). The trication contains two square pyramidal P(AuPPh3)4+ units P-coordinated to the central Au+ cation.

Original languageEnglish
Pages (from-to)245-255
Number of pages11
JournalPhosphorus, Sulfur and Silicon and the Related Elements
Volume87
Issue number1-4
DOIs
StatePublished - 1 Feb 1994

Keywords

  • Gold clusters
  • Hypercoordinate phosphorus; NMR spectroscopy
  • X-ray crystallography

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