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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 1619-1626 
    ISSN: 0044-2313
    Keywords: C—H acidic aluminium organyls ; deprotonation of bis(trimethylsilyl)methyl groups ; AlC2Si heterocycles ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Molecular Structure of Two 1-Sila-3-alanata-cyclobutane Derivatives with Four-membered AlC2Si-HeterocyclesThe C—H acidic bis(trimethylsilyl)methyl compounds Me3C—AlR2 und Me3C—CH2—AlR2 (R — CH(SiMe3)2) are deprotonated by treatment with the sterically high shielded base LiCH(SiMe3)2 in the presence of 1,3,5-trimethylhexahydrotriazinane. The deprotonation occurs at a methyl group of one of the element-organic substituents, and the formed carbanions are stabilized by coordination to the unsaturated Al atoms yielding four-membered heterocycles. Both products were characterized by a crystal structure determination each showing bent ring systems.
    Notes: Die C—H-aciden Bis(trimethylsilyl)methyl-Verbindungen Me3C—AlR2 und Me3C—CH2—AlR2 (R — CH(SiMe3)2) reagieren mit der sterisch sehr hoch abgeschirmten Base LiCH(SiMe3)2 in Gegenwart von 1,3,5-Trimethylhexahydrotriazinan unter Deprotonierung einer Methylgruppe des elementorganischen Substituenten; die dabei gebildeten Carbanionen stabilisieren sich durch eine Wechselwirkung zu dem koordinativ ungesättigten Al-Atom unter Ausbildung von viergliedrigen AlC2Si-Heterozyklen. Beide Produkte wurden durch eine Kristallstrukturbestimmung charakterisiert, die jeweils ein nicht-planares Ringsystem ergab.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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