Kinetic Assessment of the Catalytic Effect of Halide Ions on the Halogenations of Thiazole and Its Methyl Derivatives in Aqueous Medium

The present study imparts a quantitative kinetic assessment of the halogenations of thiazole and its two methyl derivatives namely 2-methylthiazole and 4-methylthiazole in aqueous medium. The kinetic study investigated the effect of bromide, chloride, and iodide ions on the bromination, chlorination, and iodination reactions respectively. Halogenated thiazole derivatives have substantial commercial importance in the medicinal and industrial fields due to their versatile reactivity linked to electronic distribution. Hence the kinetic study will assist in these applications. Halide ions have been found to exhibit a catalytic effect on the halogenation of thiazole and its methyl derivatives by respective molecular halogens. The catalytic effect has been determined based on rate constants and energy of activation for the halogenation reactions. The reaction mechanism is suggested owing to the catalytic effect of halide ions.