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

Journal Article · Tue Mar 08 04:00:00 EST 2005 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.1869497· OSTI ID:20662323

Retail, Bertrand; Pearce, Julie K; Murray, Craig; Orr-Ewing, Andrew J ^[1]

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1. School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS (United Kingdom)

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.

• OSTI ID: 20662323
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 10 Vol. 122; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

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