HR: 17:30h
AN: P54A-07    [Abstracts]
TI: Consistent Kinetics for Hydrocarbon Synthesis in Outer Planet Atmospheres
AU: * Smith, G P
EM: gregory.smith@sri.com
AF: SRI International, 333 Ravenswood Ave., Menlo Park, CA 94025, United States
AB: Recombination reactions with low energy barriers are important steps to form larger hydrocarbons in reducing atmospheres such as Titan, and statistical rate theory calculations are applied here to generate low pressure and temperature rate constants consistent with other laboratory determinations and calculated potential surface parameters. Multiple decomposition channels, sometimes leading to smaller products, must be considered. Tunneling plays an important role in H atom additions to unsaturated species. Results will be presented for the formation of benzene, butene, allyl radical, vinyl radical, and the CN + C2H4 / H + C2H3CN / HCN + C2H3 reaction system. Research supported by NASA Outer Planets Research Program.
DE: 0343 Planetary atmospheres (5210, 5405, 5704)
DE: 5210 Planetary atmospheres, clouds, and hazes (0343)
DE: 5704 Atmospheres (0343, 1060)
SC: Planetary Sciences [P]
MN: 2007 Fall Meeting