Energy dependence of the O^- transfer reactions of O ₃^- and CO₃^- with NO and SO ₂

The O transfer reactions of O₃^- and CO ₃^- with NO and SO₂ were measured as a function of temperature in the range 170-605 K in a variable-temperature flowing afterglow system and as a function of center-of-mass kinetic energy in the range 0.04-2 eV in a flow-drift tube system. The rate constant in each case showed a marked energy dependence. The rate constants measured as a function of temperature were essentially the same as those measured as a function of kinetic energy in He and Ar buffer gases when the comparison is made at the same mean center-of-mass kinetic energy. The results imply that the reactions have negligible vibrational or rotational energy dependence.