The kinetics of the reaction between 10-undecenoic acid and hydrogen bromide solution in toluene initiated by benzoyl peroxide was studied in a batch reactor in the temperature range 0-30 °C. The effects of temperature, initiator concentration, and initial mole ratio of HBr to 10-undecenoic acid on the yield of 11-bromoundecanoic acid and reaction rates were experimentally investigated. This reaction was found to exhibit "limiting conversion" behavior in the range of variables studied. A plausible explanation in the form of a mechanistic scheme for the overall reaction is provided. On the basis of the kinetic results, a free-radical chain reaction mechanism for the formation of 11bromoundecanoic acid from hydrogen bromide and 10-undecenoic acid has been postulated.
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