Zur Diazotierung aromatischer Amine in Schwefelsäure

The diazotization of 2-chloro-4,6-dinitroaniline, 2,6-dichloro-4-nitroaniline, and 4-nitroaniline in concentrated sulfuric acid is very strongly catalysed by water. At a given water concentration the reaction rates of these amines are in the ratio 50/20/1. The relation between the bimolecular rate constants k and the acidity function H₀ is very simple, the plots of log k versus H₀ being linear with a slope of 2.