No abstract

The kinetics of the reaction of 0 + CHSOCHa were investigated using fast-flow The results obtained in this study are compared with the results from other workers on these reactions. The observation of essentially equal activation energies in these two reactions is indicative of approximately equal C-H bond strengths in CH30CH3 and C H 3 0 H , This is in agreement with recent measurements of these bond energies.

A wide temperature-range study using ESR atom detection has beem employed to measure the rates of the reactions of D atoms and O atoms with NH3. In the case of the deuterium reaction, evidence is presented which shows that the interaction with NH3 proceeds via an exchange process of the type: D+NH3→NH3D+H. This reaction was studied over the temperature range of 423–741°K. The specific rate constant for this exchange reaction was found to be 1.9 ± 0.2 × 1013exp(− 10 100 ± 150 / RT) in units of cubic centimeters mole−1·second−1. The reaction of O atoms with NH3 was studied over the temperature interval of 361–677°K. The specific rate constant obtained for the reaction O+NH3→OH+NH2 was found to be 4.0 ± 0.9 × 1012exp(− 6600 ± 130 / RT) in units of cubic centimeters mole−1·second−1. This Arrhenius pre-exponential factor depends on a stoichiometric factor of 3.50 atoms per NH3 molecule assumed from other work.