Reaction of an alkynyllithium reagent with boron trifluoride: The structure of a likely intermediate in alkynyl anion chemistry

John E. Davies, Paul R. Raithby, Ronald Snaith, Andrew E.H. Wheatley

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Lithium phenylacetylide reacts with 1 equiv. of BF3·OEt2 in thf-toluene to yield both a thf adduct of tris(phenylacetylido)borane 2, which is probably the true intermediate in RC≡CLi/BF3-promoted alkynyl anion chemistry, and LiBF4, products which are considered to form via sequential LiF elimination from previously proposed acetylidoborate intermediates; complex 2 is the first structurally characterised tris(alkynyl)borane and in the solid state it forms an unusual hydrogen-bonded dimer.

Original languageEnglish
Pages (from-to)1797-1798
Number of pages2
JournalChemical Communications
Issue number18
Publication statusPublished - 1 Jan 1997

ASJC Scopus subject areas

  • Catalysis
  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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