2-(Trimethylsilyl)-λ3-Phosphinine: Synthesis, Coordination Chemistry, and Reactivity

Marija H. Habicht, Friedrich Wossidlo, Tobias Bens, Evgeny A. Pidko, Christian Müller*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

36 Citations (Scopus)


The [4+2] cycloaddition reaction between 2-pyrone and Me3Si−C≡P gives the corresponding 2-(trimethylsilyl)-λ3-phosphinine in good yields as a rather air and moisture stable, colorless oil. Insight into the regioselectivity of the pericyclic reaction was obtained with the help of deuterium-labeling experiments. The silyl-phosphinine acts as a ligand for the preparation of a Cu(I) and the first crystallographically characterized phosphinine-Ag(I) complex. The title compound was further used as a starting material for an alternative preparation of the parent phosphinine C5H5P by means of protodesilylation with HCl. C5H5P reacts with CuBr⋅S(CH3)2 to give an infinite Cu(I)Br coordination polymer. DFT calculations shed light on the influence of the -Si(CH3)3 group on the electronic properties of the aromatic phosphorus heterocycle.

Original languageEnglish
Pages (from-to)944-952
JournalChemistry - A European Journal
Issue number4
Publication statusPublished - 19 Jan 2018
Externally publishedYes


  • coordination chemistry
  • heterocycles
  • ligands
  • phosphorus


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