A Helmeted Dialkylsilylene

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Structural characteristics, spectroscopic properties, and unique reactions of a helmeted dialkylsilylene, 2,2,5,5-tetrakis(trimethylsilyl)silacyclopentane-1,1-diyl, that was synthesized as the first isolable dialkylsilylene and its application to the synthesis of novel silicon unsaturated compounds are surveyed. The silylene was found to be the least electronically perturbed among known stable silylenes by <SUP>29</SUP>Si NMR and UV–vis spectroscopies. The silylene reacts not only with well-known trapping reagents for transient silylenes, such as alcohols, triethylsilane, and 2,3-dimethylbutadiene, but also with less reactive haloalkanes and halosilanes to give the corresponding adducts. One-electron reduction of the silylene using alkali metals affords the corresponding radical anion as a relatively persistent species at low temperatures in solution. Irradiation of the silylene using visible light generates a singlet excited state with a lifetime of 80.5 ns, which reacts with various aromatic compounds and alkenes to give the corresponding silepins and siliranes in a highly regio- and stereoselective manner. The silylene is utilized for the synthesis of unique silicon unsaturated compounds, such as Si=X doubly bonded compounds (X = S, Se, Te, C=NR, etc.), a trisilaallene, a 1,3-disilagermaallene, and silylene transition-metal complexes.

収録刊行物

  • Bulletin of the Chemical Society of Japan  

    Bulletin of the Chemical Society of Japan 80(2), 258-275, 2007-02-15 

    The Chemical Society of Japan

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各種コード

  • NII論文ID(NAID)
    10018517649
  • NII書誌ID(NCID)
    AA00580132
  • 本文言語コード
    ENG
  • 資料種別
    REV
  • ISSN
    00092673
  • NDL 記事登録ID
    8640457
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z53-B35
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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