Persistent silylium ions stabilized by polyagostic Si-H⋯Si interactions

Andrey Y. Khalimon, Hua Lin Zi, R. Simionescu, Sergei F. Vyboishchikov, Georgii I. Nikonov

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)


Diagnostics for diagostics: The silylium ion 1 (see picture; C orange, Si red, H gray) is highly fluxional at room temperature but at -80°C exhibits a symmetric structure with a three-center two-electron Si-H-Si bond supported by two additional Si←H-Si agostic interactions. In the related cation 2, two Si-H bonds coordinate equivalently to the cationic silicon center to afford a symmetrical pentacoordinate silylium ion.

Original languageEnglish
Pages (from-to)4530-4533
Number of pages4
JournalAngewandte Chemie - International Edition
Issue number24
Publication statusPublished - Jun 27 2007


  • Agostic interactions
  • Density functional calculations
  • Silicon
  • Silylium ions

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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