Br 2 ) in chloroform medium have been investigated by Isolation method the observed rate of bromination, pseudo first order for 1,2-thiazine and Br 2 and second order in overall reaction and using spectrophotometric techniques. The reaction rate constant increases with increasing temperature from 273K to 318K. The kinetic and thermodynamic parameters k, E a , ΔH # and ΔS # have been calculated. The corresponding halogenated 1,2thiazine has been identified as a product of halogenation. A suitable reaction scheme is proposed and an appropriate rate law is deduced to account for the observed kinetic and thermodynamic data.

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