Catalysis in SDS
and CTAB micellar media: Kinetics of base hydrolysis of Bis(2,4,6-tripyridyl-s-triazine)
iron (II)
Leela Kumari B., Shyamala P. and Nagalakshmi K.V.
Res. J. Chem. Environ.; Vol. 28(1); 80-84;
doi: https://doi.org/10.25303/281rjce80084; (2024)
Abstract
Kinetics of the hydrolysis of [Fe(tptz)2]2+ in the presence of NaOH has been studied
in two different types of micellar media: SDS anionic and CTAB cationic. The reaction
was found to be much faster in both the micellar media compared to aqueous medium
(kSDS = 102.2 X10-4 mol-1dm3s-1, kCTAB = 43.92 X 10-4 mol-1dm3s-1, kaq = 0.115 X10-4
mol-1dm3s-1). The reaction obeys first order kinetics with respect to both the reactants
in both the media.
The rate constant versus surfactant profile shows a maximum in both cases which
is characteristic of a bimolecular micelle catalyzed reaction. The kinetic behaviour
has been accounted for by using the Berezin model.