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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1974 (1974), S. 1333-1347 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Aromatic Diazo Compounds, V1). - Reaction of Aromatic Diazonium Salts with Nitrite Ions2)The kinetics of the reaction of m-nitrobenzenediazonium tetrafluoroborate with excess sodium nitrite in aqueous buffer solution at pH 6.5 have been investigated volumetrically. The influence of changes in concentration of diazonium salt, nitrite ion and buffer on the rate of reaction was determined. A different reaction order and slightly different rates were observed when the reactions were conducted under nitrogen instead of oxygen or air. Trapping experiments proved aryl radicals to be intermediates of the reactions. A radical chain mechanism in which N-nitro aryldiimine participates is proposed.
    Notes: Die Kinetik der Reaktion von m-Nitrobenzoldiazonium-tetrafluoroborat mit überschüssigem Natriumnitrit in wässeriger Pufferlösung bei pH 6.5 wurde in Abhängigkeit von der Konzentration an Diazoniumsalz, Nitritionen und Puffer gasvolumetrisch verfolgt. Dabei wurden unter Stickstoff eine andere Reaktionsordnung und Reaktionsgeschwindigkeit festgestellt als unter Sauerstoff oder Luft. - Arylradikale konnten durch Abfangen als Zwischenstufe nachgewiesen werden. Es wird ein Radikalkettenmechanismus vorgeschlagen, an dem N-Nitroaryldiimin beteiligt ist.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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