Energy dependencies of fast reactions of positive ions X+ with HCl from near thermal to [bar_over_tilde:_approx._equal_to]2 eV center-of-mass collision energy (X+=H+,H2+,H3+,N+,N2+,Ar+,C+,CH+, CH2+,CH3+,CH4+,CH5+)

Glosik, J.; Freysinger, W.; Hansel, A.; Spanel, P.; Lindinger, W.
May 1993
Journal of Chemical Physics;5/1/1993, Vol. 98 Issue 9, p6995
Academic Journal
The rate coefficients for the reactions of the ions H+, H2+, H3+, N+, N2+, Ar+, C+, CH+, CH2+, CH3+, CH4+, and CH5+ with HCl have been measured as a function of reactant ion/reactant neutral average center-of-mass kinetic energy (KEc.m.). The measurements were performed using a selected ion flow drift tube operated at 300 K with helium buffer gas. Most of these reactions have rate coefficients close to their collisional values at ambient temperature and all of them exhibit a pronounced KEc.m. dependence. A simple model is proposed, in which the measured dependence of the rate coefficients on KEc.m. is expressed in terms of the kinetic-energy dependence of the rate unimolecular decomposition of the intermediate complex formed in the ion-neutral collision.


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