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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 2776-2785 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Aminyl Oxides (Nitroxides), XXX. Vinylaminyl Oxides. Spin Density Distribution and ReactionsVinylaminyl oxides 1a - c and [17O]-1a have been investigated ESR spectroscopically. The spin density distribution of 1a agrees well with a theoretical spin density calculation. Oxidation of 2e does not yield 1e but 4e directly. 1a and c are transformed to secondary radicals 4 by a spin-trap reaction with the starting nitrons 2. Such reactions of 1c have been found also with nitrone 6, nitrile oxide 8, diene 10, and nitroso compounds 12 and 13, yielding the radicals 7, 9, 11, 14, or 15, respectively. 1c dimerises by C  -  C coupling to form 17. Attempts to prepare vinylaminyl oxides by oxidation of 19 or 21 yielded the isomeric pair of iminyl oxides 20A/B and the enaminyl radical 22, respectively.
    Notes: Die Vinylaminyloxide 1a - c sowie [17O]-1a wurden ESR-spektroskopisch untersucht. Die Spindichteverteilung in 1a stimmt gut mit theoretisch berechneten Werten überein. 1a und c wandeln sich durch eine Spin-trap-Reaktion mit Ausgangsnitron 2 in Sekundärradikale 4 um. 2e liefert bei der Oxidation nicht 1e, sondern direkt 4e. Reaktion von 1c mit Nitron 6, Nitriloxid 8, Dien 10 und Nitrosoverbindungen 12 und 13 ergab Radikale 7, 9, 11, 14, oder 15, 1c dimerisiert unter C - C-Verknüpfung zu 17 Versuche zur Darstellung von Vinylaminyloxiden durch Oxidation von 19 führten zu Iminyloxiden 20A/B, aus 21 wurde das Enaminyl-Radikal 22 gebildet.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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