Volume 369, Number 2, April II 2001
|Page(s)||611 - 615|
|Published online||15 April 2001|
The production of HCN dimer and more complex oligomers in dense interstellar clouds
School of Chemistry, The University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
2 LETMEX, Université de Nice Sophia Antipolis, Parc Valois, U.F.R. Sciences, 06108 Nice Cedex 2, France
3 Departments of Physics and Astronomy, The Ohio State University, Columbus, OH 43210, USA
Corresponding author: E. Herbst, firstname.lastname@example.org
Accepted: 16 January 2001
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.
Key words: ISM: abundances / ISM: molecules
© ESO, 2001
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