Thermokinetic investigation of the alcoholysis of acetyl chloride - Part I

The alcoholysis of acetyl chloride under various reaction conditions has be en investigated by isoperibolic calorimetry and HPLC-analysis. Non-linear k inetic evaluation has been realized by the program TA-kin 3.3 on the basis of temperature and concentration data, Depending on the excess of alcohol, different partial reaction orders are found. The reaction rate also depends on the basicity of the solvent, This could be caused by H-bonding with the alcohol increasing the activation energy. It was possible to distinguish between the kinetic parameters of the ethano lysis and the i-propanolysis of acetyl chloride in the evaluation of the al coholysis of acetyl chloride by alcoholic mixtures at stoichiometric concen trations of the reagents. A partial order of n = 0.5 far the alcohol, as de termined in the evaluation of the single alcoholysis under these conditions , has been confirmed. The results show that heat accumulations are an impor tant feature for the kinetic evaluation of reactions under the concentratio n conditions described.:(C) 2000 Elsevier Science B.V. All rights reserved.