Abstract
The alkaline hydrolysis of 2-chloro-3,5-dinitrobenzotrifluoride (CDNBTF) as substrate in presence of the cationic surfactant dodecyl trimethylammonium bromide (DoTAB) above its critical micelle concentration (cmc) is studied spectrophtometrically at different acetonitrile (AN) -water mixtures and at different temperatures. Pseudo first order rate constant is found to increase by increasing the mole fraction of acetonitrile X
AN
in presence of the micelle indicated that micelle is catalyzed this reaction. The reaction is carried out in presence of adding NaBr, shown to decrease the rate of this reaction due to repelling the substrate from the micellar area causes salting out effect. Binding constant (K
S
) between micelle and the substrate at different X
AN
as well as solvatochromic properties of the given solutions are discussed.
1
H NMR at only 50 and 80 AN-D
2
O v/v % are carried out to test the substrate orientation near micelles.