Collect. Czech. Chem. Commun.
1983, 48, 748-754
https://doi.org/10.1135/cccc19830748
Kinetics and mechanism of the azo coupling reaction of 1-aminonaphthalene-4-sulfonic acid
Barbu A. Demiana, Otto Exnerb and Aurora Salloa
a Chemistry Research Center, 1900 Timisoara, Romania
b Institute of Organic Chemistry and Biochemistry, Czechoslovak Academy of Science, 166 10 Prague 6, Czechoslovakia
Abstract
Kinetics of the azo coupling reaction of 1-aminonaphthalene-4-sulfonic acid with nine substituted benzenediazonium chlorides was investigated at four temperatures. The results were processed in terms of the isokinetic relationship and of an isoparametric relationship with temperature and σ constant as independent variables. There is a great similarity to the coupling reaction of 1-hydroxynaphthalene-4-sulfonic acid; all the results are consistent with a cyclic transition state implying variable association of a water molecule.
