Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004dps....36.2005w&link_type=abstract
American Astronomical Society, DPS meeting #36, #20.05; Bulletin of the American Astronomical Society, Vol. 36, p.1114
Astronomy and Astrophysics
Astronomy
Scientific paper
The ethynyl radical (C2H) can attack unsaturated carbon-carbon bonds with no activation barrier, making such reactions very favorable under the low temperature and pressure conditions in Titan's upper atmosphere, where tholin production generates the satellite's distinctive haze layers. We have used density functional theory to characterize reactions between C2H and R1R2C=CR3R4 species ranging from ethylene to tetramethyl ethylene. Outcomes include multi-channel addition-elimination reactions and H abstraction. We will discuss trends in the reaction rates and product distributions as a function of temperature and pressure. Support for this work by the NASA Planetary Atmospheres program (grant NAG5-12305) is gratefully acknowledged.
Park Ji-Yong
Woon David E.
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