Mechanism of Sulfonation of 4-Hydroxyazobenzene

Autor: H. Cerfontain, W. M. J. Strachan, E. Buncel
Rok vydání: 1971
Předmět:
Zdroj: Canadian Journal of Chemistry. 49:152-156
ISSN: 1480-3291
0008-4042
DOI: 10.1139/v71-024
Popis: The mechanism of sulfonation of 4-hydroxyazobenzene and of 4-hydroxyazobenzene-4′-sulfonic acid in concentrated sulfuric acid media is examined through rate correlations and comparison is drawn with sulfonation of alkyl- and halogenobenzenes by means of [Formula: see text] plots. It is concluded that several mechanisms are operative in the hydroxyazobenzene system and that the curvature of the plot is the result of a change in rate-determining step from σ-complex formation to proton abstraction.
Databáze: OpenAIRE