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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 819-831 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Open and Bridged Intermediates 2. The Occurence of Bridged Intermediates in the Bromination of Norbornene DerivativesIn the exo-bromination of the norbornene-endo,cis-dicarboxylates 3 the rate determining and the product determining steps occur one after another. The kinetic and stereochemical experiments are best explained by the non classical ion 6 as an intermediate. Methyl groups in position 7 prevent the development of the three-membered ring and the radical bromination successfully competes with the ionic reaction.
    Notes: Bei der exo-Bromierung der Norbornen-endo,cis-dicarbonsäurederivate 3 treten der geschwindigkeitsbestimmende und der produktbestimmende Schritt zeitlich nacheinander auf. Für die Zwischenstufe wird aus kinetischen und stereochemischen Daten das nicht-klassische Ion 6 wahrscheinlich gemacht. Verhindern 7-ständige Methylgruppen die Ausbildung des dreigliedrigen Ringes, dann konkurriert die radikalische Bromanlagerung an die Olefine erfolgreich mit dem Ionenangriff.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
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