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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 2980-2994 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactivity of the Germaethene Me2Ge=C(SiMe3)2Germaethene Me2Ge=C(SiMe3)2 (2), generated as a reaction intermediate by thermal elimination of LiX from Me2XGe—CLi(SiMe3)2 or by thermal cycloreversion from the adduct 2 · Ph2CO, combines with reactants a—b (e.g. MeO—H) under insertion into the a—b bond (formation of 4), with a = b—c—H (e.g. CH2=CR—CH2—H; R=H, Me, CMe=CH2) under ene reaction (formation of 19-21), and with [e.g. CH2=CHOMe, O=CPh2 or RN=N=N (R = tBu, tBu3-nMenSi), O=N=N or CH2=CR—CR=CH2 (R=H, Me)] under [2 + 2], [2 + 3], and [2 + 4] cycloaddition (formation of 6, 7 or 9-14 or 17, 18). By comparison with the silaethene Me2Si=C(SiMe3)2 (1), 2 is less Lewis acidic and its double bond is less polar.
    Notes: Das Germaethen Me2Ge=C(SiMe3)2 (2), erzeugt als Reaktionszwischenstufe durch thermische LiX-Eliminierung aus Me2XGe=CLi(SiMe3)2 (2 · LiX) oder durch thermische Cycloreversion aus dem Addukt 2 · Ph2CO, reagiert mit Reaktanden a= (z. B. MeO=H) unter Insertion in die a-b-Bindung (Bildung von 4), mit a—b—c—H (z. B. CH2=CR=CH2=H; R = H, Me, CMe=CH2) unter En-Reaktion (Bildung von 19-21) und mit [z. B. CH2=CHOMe, O=CPh2 oder RN=N=N (R=tBu, tBu3-nMenSi), O=N=N oder CH2=CR—CR=CH2 (R = H, Me)] unter [2 + 2]-, [2 + 3]- sowie [2 + 4]-Cycloaddition (Bildung von 6, 7 bzw. 9-14 bzw. 17, 18). Verglichen mit dem Silaethen Me2Si=C(SiMe3)2 (1), ist 2 weniger Lewis-sauer und seine Doppelbindung unpolarer.
    Type of Medium: Electronic Resource
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