The first free 7λ3-phosphanorbornadiene

Maurice J. Van Eis, Herman Zappey, Franciscus J.J. De Kanter, Willem H. De Wolf, Koop Lammertsma, Friedrich Bickelhaupt

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22 Citations (Scopus)


The first uncoordinated 7λ3-phosphanorbornadiene 10 is reported. This missing member of the class of 7-heteranorbornadienes was prepared by decomplexation of its pentacarbonyltungsten complex 6 with iodine and N- methylimidazole. It is moderately stable at room temperature toward loss of the phosphinidene bridge (PhP:) because the aromatic fragment, [5]metacyclophane (5), is a highly strained compound. For this reason, 10 may be considered to be a hyperstable compound. An analysis of the energetics of the system by density functional calculations supports this rationalization.

Original languageEnglish
Pages (from-to)3386-3390
Number of pages5
JournalJournal of the American Chemical Society
Issue number14
Publication statusPublished - 12 Apr 2000
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


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