Abstract
The kinetics of the gas phase pyrolysis of methyl 3-bromopropionate, under maximum catalysis of HBr, were found to be of order 1.0. The reaction appears to undergo a molecular elimination of HBr, which follows first-order kinetics. The products are methyl acrylate and HBr. The pyrolysis, in s static system and seasoned vessel, was examined over the temperature range of 330.5–378.5°C and pressure range of 64–145 Torr. The rate coefficients, under maximum catalysis, are given by the Arrhenius equation log k1(s−1)=(11.19±0.64)−(171.6±7.7) kJ/mol/2.303 RT. The mechanism of the catalyzed pyrolysis of the bromoester appears to proceed through a six-membered cyclic transition state.
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