A combined experimental and theoretical study on the formation of interstellar C3H isomers.
Science
; 274(5292): 1508-11, 1996 Nov 29.
Article
en En
| MEDLINE
| ID: mdl-8929407
ABSTRACT
The reaction of ground-state carbon atoms with acetylene was studied under single-collision conditions in crossed beam experiments to investigate the chemical dynamics of forming cyclic and linear C3H isomers (c-C3H and l-C3H, respectively) in interstellar environments via an atom-neutral reaction. Combined state-of-the-art ab initio calculations and experimental identification of the carbon-hydrogen exchange channel to both isomers classify this reaction as an important alternative to ion-molecule encounters to synthesize C3H radicals in the interstellar medium. These findings strongly correlate with astronomical observations and explain a higher [c-C3H]/[l-C3H] ratio in the dark cloud TMC-1 than in the carbon star IRC+10216.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Astronomía
/
Carbono
/
Polvo Cósmico
/
Hidrocarburos
/
Hidrógeno
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Science
Año:
1996
Tipo del documento:
Article
País de afiliación:
Estados Unidos