In a perchloric and hydrochloric acid medium mixture, thallium (III) reacts with benz and m-chloro benz acid hydrazide. The process of the reaction begins with the creation of a complex with the reactant, which breaks down later to produce the product. Acrylonitrile's reaction indicates that no free radicals are produced. As [H+ ] and [Cl- ] rise, the reaction's rate decreases. A rise in ionic strength has no impact on the reaction's speed. At four various temperatures ranging from 288K to 303K, temperature effects were examined. A mechanism has been investigated, as well as the activation parameters. For BAH and m-chloro BAH, to calculate the reaction constant (????) and the substituents constant (????).