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Título
Peptide bond formation through gas-phase reactions in the interstellar medium: Formamide and acetamide as prototypes
Año del Documento
2014
Editorial
American Astronomical Society
Descripción
Producción Científica
Documento Fuente
The Astrophysical Journal, Volume 793, Issue 1, 8 p. (2014)
Zusammenfassung
A theoretical study of the reactions of NH+4 with formaldehyde and CH+5 with formamide is carried out. The viability of these gas-phase ion–molecule reactions as possible sources of formamide and acetamide under the conditions of interstellar medium is evaluated. We report a theoretical estimation of the reaction enthalpies and an analysis of their potential energy surfaces. Formation of protonated formamide from the reaction between ammonium cation and formaldehyde is an exothermic process, but all the channels located on the potential energy surface leading to this product present net activation energies. For the reaction between methanium and formamide, different products are possible from a thermodynamic point of view. An analysis of its potential energy surface showed that formation of protonated acetamide and amino acetaldehyde takes place through barrier-free paths. Therefore, this reaction could be a feasible source of acetamide and amino acetaldehyde in space
Palabras Clave
Astrobiología
Astroquímica
Moléculas
ISSN
0004-637X
Revisión por pares
SI
Patrocinador
Junta de Castilla y León (programa de apoyo a proyectos de investigación – Ref. VA330U13)
Version del Editor
Propietario de los Derechos
© The American Astronomical Society
Idioma
eng
Derechos
openAccess
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