Tri-tert-butylsilylsilylenes with alkali metal substituents ( tBu3Si)SiM (M = Li, K): Electronically and sterically accessible triplet ground states

Akira Sekiguchi, Takashi Tanaka, Masaaki Ichinohe, Kimio Akiyama, Peter P. Gaspar

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


Lithium-, sodium-, and potassium-substituted silirenes 2a-c have been prepared by the reaction of bis(tri-tert-butylsilyl)silirene 1 with the corresponding alkali metals and characterized by NMR spectroscopy and chemical trapping (2a and 2b). Lithio- and potassiosilylenes, Li(tBu3Si)2Si: (4a) and K(tBu3Si)2Si: (4b), were generated by low-temperature irradiation of 2a and 2b, respectively, and their EPR spectra revealed the characteristic broad EPR signals at 790 mT for 4a and 780 mT for 4b. The Curie law dependence observed for 4a was in accord with a triplet ground state, also assigned to 4b. Computations on model lithiosilylenes support these assignments.

Original languageEnglish
Pages (from-to)426-427
Number of pages2
JournalJournal of the American Chemical Society
Issue number2
Publication statusPublished - 2008 Jan 16

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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