“…The purification of the reactant for this purpose was unsuccessful. The fact that CFJ, C3F8, and COz were found as reaction products and a value close to unity for the ratio The remaining steps of the proposed mechanism mainly refer to reactions previously studied by other authors so much so that the Arrhenius parameters for the reactions of steps 7 and 8 which occur with almost no activation energy [14,15] are well established. Even though the parameters have not been reported for the step CzF5 + HI = CzF5H + I, it can be expected that they do not significantly differ from those given by Amphlett and Whittle [16] for the reaction CF3 + HI = CF3H + I (IogA = 11.73 mol-' cm3 s-l, and E, = 2.1 kJ mol-').…”