REACTIONS OF O-+N2O AT 300-K - THE TOTALLY LABELED EXPERIMENTS

The tandem flowing afterglow-selected ion flow tube was employed to study the isotopically labeled reactions of O- + N2O→ NO- + NO at 300 K. In the reactions of 16O- + 15N14N16O, 16O- + 14N15N16O and 18O- + 14N14N16O, both of the possible NO- products are formed with equal probability, indicating that equilibration is achieved within the reaction complex before dissociation. In the totally labeled reactions of 18O- + 15N14N 16O and 18O- + 14N 15N16O all possible NO- products are observed which strongly supports the formation of both trigonal and linear N 2O2- intermediates along the reaction path. The reaction mechanism is discussed and these results are compared with those of other workers. © 1990 American Institute of Physics.