Unusual bonding in trisilaallene and related heavy allenes

Mitsuo Kira, Takeaki Iwamoto, Shintaro Ishida, Hidenori Masuda, Takashi Abe, Chizuko Kabuto

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)


The synthesis, X-ray and spectroscopic analysis, and unusual bonding and structure among heavy group-14 element congeners of allene (heavy allenes) [R2M=M′=MR2; M = M′ = Si (1a), M ) Si, M′) Ge (1b), M = Ge, M′ = Si (1c), and M = M′ = Ge (1d)] are comparatively discussed. Using DFT calculations and PMO theory, the origin of the bent and fluxional skeleton of the heavy allenes is ascribed to the Jahn-Teller distortion associated with the effective π-σ* mixing (π-σ* distortion). This type of distortion is suggested to be a key concept for qualitative description of the unusual bonding of unsaturated compounds of heavy main-group elements.

Original languageEnglish
Pages (from-to)17135-17144
Number of pages10
JournalJournal of the American Chemical Society
Issue number47
Publication statusPublished - 2009 Dec 2


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