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  • 1
    Electronic Resource
    Electronic Resource
    Synthese von mono- und bicyclischen Diazasilaalkenen (1980)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1980 (1980), S. 1898-1903 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of Mono- and Bicyclic DiazasilaalkenesLithium salts of hydrazones react with difluorosilanes to give the (fluorosilyl)hydrazones 1 - 7. The reaction of 1 - 7 with tert-butyllithium leads intramolecularily to the mono- and bicyclic diazasilaaikenes 8 - 14. Lithiated 12 reacts with chlorotrimethylsilane to give 15.  -  The mass and NMR spectra of the compounds are reported.
    Notes: Lithiumsalze von Hydrazonen reagieren mit Difluorsilanen zu den (Fluorsilyl)hydrazonen 1 - 7. Die Reaktion von 1 - 7 mit tert-Butyllithium führt intramolekular zur Bildung der mono- und bicyclischen Diazasilaalkene 8 - 14. Die Verbindung 12 reagiert nach Lithiierung mit Chlortrimethylsilan zu 15.  -  Die Massen- und NMR-Spektren der Verbindungen werden mitgeteilt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198019801126
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  • 2
    Electronic Resource
    Electronic Resource
    Addition von Silicenium-Yliden an konjugierte Doppelbindungen (1980)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1980 (1980), S. 1978-1980 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Addition of Silicenium Ylides to Conjugated Double BondsIn the reaction of 2-methyl-2-propenal with lithioaminofluorosilanes LiF is eliminated and [2 + 4]-cycloaddition to the intermediate sila imine is observed.
    Notes: Bei der Reaktion von 2-Methyl-2-propenal mit Lithio-aminofluorsilanen wird unter LiF-Abspaltung eine [2 + 4]-Cycloaddition mit dem intermediären Silaimin beobachtet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198019801208
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  • 3
    Electronic Resource
    Electronic Resource
    Synthese von (Fluorsilyl)hydrazonen und Ringschluß zu 1,2-Diaza-3-sila-5-cyclopentenen (1979)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1979 (1979), S. 457-460 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of (Fluorosilyl)hydrazones and Cyclization to 1,2-Diaza-3-sila-5-cyclopentenes(Fluorosilyl)hydrazones 2 - 5 are formed in the reaction of lithiated hydrazones 1 with fluorosilanes. On reaction with butyllithium 2 - 5 cyclize to give the five-membered heterocycles 8 - 11. Substituted compounds 6, 7 are obtained in a competing reaction. - The mass, 1H, 19F, and29Si-NMR spectra of the compounds prepared are reported.
    Notes: (Fluorsilyl)hydrazone 2-5 entstehen aus lithiierten Hydrazonen 1 mit Fluorsilanen. Die Reaktion von 2-5 mit Butyllithium führt unter Cyclisierung zur Bildung der fünfgliedrigen Heterocyclen 8-11. In einer Konkurrenzreaktion werden substituierte Verbindungen 6, 7, gebildet. - Die Massenspektren, 1 H-, 19F- und 29Si-NMR-Spektren der dargestellten Verbindungen werden mitgeteilt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197919790405
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  • 4
    Electronic Resource
    Electronic Resource
    From cyclotetrasilazane [(CH3)2SiNH]4 via crystalline silicon nitride imide Si2N2NH to α-Si3N4 (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 7 (1993), S. 53-56 
    Details
    ISSN: 0268-2605
    Keywords: Silazane ; synthesis ; thermal ; silicon nitride ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: α-Si3N4 is synthesized by an ammonia thermal synthesis using a cyclic oligosilazane, [(CH3)2SiNH]4, as the starting material. [(CH3)2SiNH]4 reacts in the presence of ammonia at 900°C and 80 MPa pressure to give silicon nitride imide (Si2N2NH). Subsequently, Si2N2NH is converted into α-Si3N4 by thermal decomposition at 1500°C and 0.1 MPa nitrogen with the simultaneous loss of NH3.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590070106
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  • 5
    Electronic Resource
    Electronic Resource
    From crystalline boryl-substituted and boryl-coupled 2,2,4,4,6,6-hexamethyl-cyclotrisilazanes to β-SiC and BNFurther data are available from the Cambridge Crystallographic Data Centre, Cambridge, UK. (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 8 (1994), S. 491-498 
    Details
    ISSN: 0268-2605
    Keywords: Cyclosilazane ; BF-coupled rings ; crystal structure ; pyrolysis ; β-SiC/BN composites ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: [Me2SiNBFN(SiMe3)2]3 (1) is synthesized in the reaction of trilithiated hexamethylcyclotrisilazane with F2BN(SiMe3)2. The mono- and dilithium derivatives of the six-membered ring (Me2SiNH)2 Me2SiNSiFMe2 react with the F2B-substituted cyclotrisilazane F2B(NSiMe2)3(SiFMe2)2 in the molar ratio 1:1 or 1:2 to give the BF-coupled rings 2 and 3. The crystal structure analysis of 1 and 3 and pyrolysis of 1 and 3 with formation of silicon boron carbonitride and its crystallisation to composite powders at very high temperatures are reported.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590080509
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