A simple and widely used method for measuring rate constants is the calculation of k from the kinetic curve of starting material consumption. Monomolecular decomposition is described by an exponential law, C = Coe−kt or ln(Co/C) = kt. The constant is found from the slope of the straight line plotted on coordinates of log Co vs. t. It is evident that k should not depend on Co. Nevertheless, in some cases, along with the monomolecular decomposition, an induced decomposition occurs. For example, benzoyl peroxide in certain solvents decomposes monomolecularly with a velocity kC, and under the action of free radicals with a velocity k’C3/2 (k’ is the effective rate constant of the induced decomposition).
KeywordsBenzoyl Peroxide Nitro Compound Isobutyric Acid Cage Effect Decomposition Rate Constant
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