Journal
ASTRONOMY & ASTROPHYSICS
Volume 369, Issue 2, Pages 611-615Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20010126
Keywords
ISM : abundances; ISM : molecules
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Using quantum chemical and kinetic techniques, we show that the reaction between two HCN molecules under interstellar conditions cannot lead efficiently to a dimer of this species (H2C2N2), whatever its structure. If the dimerization reaction does not occur efficiently, then it is impossible to synthesize detectable abundances of the pre-biotic HCN oligomer adenine (H5C5N5) in the interstellar medium via successive neutral-neutral reactions between HCN and its dimer, trimer, and tetramer.
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