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The rate of the reaction between C2H and C2H2 at interstellar temperaturesThe reaction between the radical C2H and the stable hydrocarbon C2H2 is one of the simplest neutral-neutral hydrocarbon reactions in chemical models of dense interstellar clouds and carbon-rich circumstellar shells. Although known to be rapid at temperatures > or = 300 K, the reaction has yet to be studied at lower temperatures. We present here ab initio calculations of the potential surface for this reaction and dynamical calculations to determine its rate at low temperature. Despite a small potential barrier in the exit channel, the calculated rate is large, showing that this reaction and, most probably, more complex analogs contribute to the formation of complex organic molecules in low-temperature sources.
Document ID
20040089228
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Herbst, E. (Ohio State University Columbus 43210-1106, United States)
Woon, D. E.
Date Acquired
August 21, 2013
Publication Date
November 1, 1997
Publication Information
Publication: The Astrophysical journal
Volume: 489
Issue: 1
ISSN: 0004-637X
Subject Category
Exobiology
Funding Number(s)
CONTRACT_GRANT: NAG2-16
Distribution Limits
Public
Copyright
Other
Keywords
Non-NASA Center
NASA Discipline Exobiology