RT info:eu-repo/semantics/article
T1 Peptide bond formation through gas-phase reactions in the interstellar medium: Formamide and acetamide as prototypes
A1 Redondo Cristóbal, María del Pilar
A1 Barrientos Benito, María Carmen
A1 Largo Cabrerizo, Antonio
K1 Astrobiología
K1 Astroquímica
K1 Moléculas
AB 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
PB American Astronomical Society
SN 0004-637X
YR 2014
FD 2014
LK http://uvadoc.uva.es/handle/10324/22507
UL http://uvadoc.uva.es/handle/10324/22507
LA eng
NO The Astrophysical Journal, Volume 793, Issue 1, 8 p. (2014)
NO Producción Científica
DS UVaDOC
RD 26-abr-2024