aDepartment of Chemistry, Sona College of Technology, Salem, Tamil Nadu, India.
bChemistry Division, School of Science & Humanities, V.I.T. University, Vellore, Tamil Nadu, India.
Kinetics of reduction of dithiazone by stannous chloride has been carried out in aqueous medium at room temperature. The kinetics was studied in the presence of cationic surfactant, Cetyl Trimethyl ammonium Bromide (CTAB) and anionic surfactant, Sodium Dodecyl Sulphate (SDS). The reduction of dithiazone in the presence of CTAB is much faster than in the absence of surfactant. No significant change was observed with SDS. The significant rate enhancement of these reactions in presence of CTAB micelles is due to the hydrophobic and electrostatic interactions between the substrate, reductant and micelles. These effects are discussed on the basis of interactions of the above compounds and micelles of different charge type. A suitable mechanism consistent with the experimental findings has been proposed. The binding constant between the substrate and CTAB micelles in aqueous medium has been calculated by analyzing the data using pseudo phase model and found to be 359 M −1.
Cetyl trimethyl ammonium bromide, Sodium dodecyl sulphate, Dithiazone, Stannous chloride, Binding constant, Micellar media
