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Title: Nonadiabatic dynamics in the CH{sub 3}+HCl{yields}CH{sub 4}+Cl({sup 2}P{sub J}) reaction

Nonadiabatic dynamics in the title reaction have been investigated by 2+1 REMPI detection of the Cl({sup 2}P{sub 3/2}) and Cl{sup *}({sup 2}P{sub 1/2}) products. Reaction was initiated by photodissociation of CH{sub 3}I at 266 nm within a single expansion of a dilute mixture of CH{sub 3}I and HCl in argon, giving a mean collision energy of 7800 cm{sup -1} in the center-of-mass frame. Significant production of Cl* was observed, with careful checks made to ensure that no additional photochemical or inelastic scattering sources of Cl* perturbed the measurements. The fraction of the total yield of Cl({sup 2}P{sub J}) atoms formed in the J=(1/2) level at this collision energy was 0.150{+-}0.024, and must arise from nonadiabatic dynamics because the ground potential energy surface correlates to CH{sub 4}+Cl({sup 2}P{sub 3/2}) products.
Authors:
; ; ;  [1]
  1. School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS (United Kingdom)
Publication Date:
OSTI Identifier:
20662323
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 122; Journal Issue: 10; Other Information: DOI: 10.1063/1.1869497; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ARGON; CENTER-OF-MASS SYSTEM; CHLORINE IONS; GROUND STATES; HYDROCHLORIC ACID; INELASTIC SCATTERING; METHANE; METHYL IODIDE; METHYL RADICALS; PHOTOIONIZATION; PHOTON-MOLECULE COLLISIONS; REACTION KINETICS