Mn. Khan et E. Ismail, Effects of nonionic and mixed cationic-nonionic micelles on the rate of alkaline hydrolysis of 4-nitrophthalimide, J COLL I SC, 240(2), 2001, pp. 636-639
Pseudo-first-order rate constants (k(obs)) for alkaline hydrolysis of 4-nit
rophthalimide show a monotonic decrease with increase in [C12E23](T) (total
concentration of Brij 35) at constant [CH3CN] and [NaOH]. This micellar ef
fect is explained in terms of a pseudophase micelle model. The rate of hydr
olysis becomes too slow to monitor at [C12E23](T) greater than or equal to
0.03 M in the absence of cetyltrimethylammonium bromide (CTABr) and at [C12
E23](T) greater than or equal to 0.04 M in the presence of 0.006-0.02 M CTA
Br at 0.01 M NaOH. The plots of k(obs) versus [C12E23](T) show minima at 0.
006 and 0.01 M CTABr, while such a minimum is not visible at 0.02 M CTABr.
(C) 2001 Academic Press.