Absolute rate constants for chain termination by ten t-peroxy radicals have been measured at 30° by the rotating sector technique, the photochemical pre- and after-effect method, and by electron spin resonance. The different methods generally give results in good agreement with one another. The termination rate constants vary from a low of ∼4 × 10 2 M −1 s −1 for t-butylperoxy to a high of ∼3 × 10 4 M −1 s −1 for 1,1-diphenylethylperoxy radicals.
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Howard et al. (1969) studied this question.