P. Bocherel et al., ULTRALOW-TEMPERATURE KINETICS OF CH(X(2)PI) REACTIONS - RATE COEFFICIENTS FOR REACTIONS WITH O-2 AND NO (T=13-708 K), AND WITH NH3 (T=23-295 K), Journal of physical chemistry, 100(8), 1996, pp. 3063-3069
The pulsed laser photolysis (PLP), laser-induced fluorescence (LIF) te
chnique for the study of the kinetics of free-radical reactions is app
lied to reactions of CH radicals both in the ultralow-temperature envi
ronment of a Cinetique de Reaction en Ecoulement Supersonique Uniforme
(CRESU) apparatus, as well as in a conventional heated cell. The comb
ined techniques provide kinetic data over an extremely wide temperatur
e range. Rate coefficients are reported for the reactions of CH with O
-2 (T = 13-708 K), NO (T = 13-708 K), and NH3 (T = 23-295 K). All thre
e reactions remain very rapid down to the lowest temperatures at which
measurements were made and display differing temperature dependences.
The results are discussed in the light of previous work on these syst
ems and of the reaction mechanisms.