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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 217-233 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Skeletal Rearrangements under Electron Impact, VI. Studies on the Alkyl- and Hydrogenmigration in Diphenic Acid Derivatives, III4)On electron impact derivatives of biphenyl with alkoxy substituents in 2- and 6-position show cleavage of the central C-C-bridge. Thereby formally an alkylene group is transferred from the eliminated radical to the resulting fragment ion. In the case of methyl 6.2'.6'-trimethoxybiphenyl-2-carboxylate the rearrangement ion forms the base peak. Derivatives with only one ortho substituent in both rings also exhibit the rearrangement, here the 2'-methoxy-biphenyl-2-carboxylic acid displays the most abundant rearrangement ion.
    Notes: Bei Biphenylderivaten mit Alkoxysubstituenten ortho-ständig zur Biphenylbindung wird unter Elektronenbeschuß die zentrale C-C-Brücke gespalten. Dabei überträgt das eliminierte Radikal formal einen Alkylenrest auf das entstehende Fragmention. Im Falle des 6.2'.6'-Trimethoxy-biphenyl-carbonsäure-(2)-methylesters bildet dieses Umlagerungsion den stärksten Peak überhaupt. Auch bei lediglich zwei ortho-ständigen Resten findet die Umlagerung statt, wobei die 2'-Methoxy-biphenyl-carbonsäure-(2) die höchste Intensität aufzuweisen hat.
    Additional Material: 10 Tab.
    Type of Medium: Electronic Resource
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