Acid-catalyzed hydrolysis of N-phenylbenzohydroxamic acid

The kinetics of hydrolysis of N-phenylbenzohydroxamic acid have been studied from 0.9 to 10.8 mol dm(-3) H2SO4 in 10/90 (v/v) n-propanol-water medium at 55 degrees C. The rate of reaction increases initially with increasing acidity, reaches a maximum and then decreases. After that at high acidities there is steep increase in reaction rate. The effect of temperature on the rate of hydrolysis has been studied. Activation parameters have been calculated. Bimolecular nature has been supported by Hammett, Zucker-Hammett, Bunnett, Bunnett-Olsen and Arrhenius activation parameters etc.