Effect of cetyltrimethylammonium bromide micelles on the ionic equilibrium and the reactivity of hydrogen peroxide toward electrophilic substrates

• Published in: Theoretical and experimental chemistry Vol. 44; no. 2; pp. 84 - 92
• Main Authors: Vakhitova, L. N., Bogutskaya, K. V., Taran, N. A., Razumova, N. G., Savelova, V. A., Popov, A. F.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01-04-2008
• Subjects: Chemistry; Chemistry and Materials Science; Chemistry/Food Science; micellar catalysis; peroxide anion; acid ionization constant; nucleophilic substitution; hydrogen peroxide
• ISSN: 0040-5760; 1573-935X
• DOI: 10.1007/s11237-008-9014-0

The acid-base equilibrium of hydrogen peroxide in aqueous solutions of CTAB and the reactivity of the peroxide anion toward 4-nitrophenyl diethylphosphate and 4-toluenesulfonate were studied. It was shown that the acid ionization rate constant of hydrogen peroxide is increased by three times with increase in the CTAB concentration from 0 to 0.03 M. This makes it possible to realize the decomposition of the substrates by their reaction with the peroxide anion at lower pH values in micellar cationic systems than in aqueous solutions.