A kinetic study of the rhodium complex catalyzed carbonylation of methanol is reported. The reaction was investigated at CO pressures between 1 and 50 atm and in the temperature range 150-225OC. It was discerned to be zero order with respect to the reactants, and first order with respect to the catalyst and promotor. The activation energy was found to be 14.7 kcal/mol, the values for the activation entropy and enthalpy being in good agreement with the assumption that the oxidative addition is the ratedetermining step in the catalytic cycle.
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