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oai:uvadoc.uva.es:10324/225052021-06-23T11:52:22Zcom_10324_1186com_10324_931com_10324_894col_10324_1404

Some Insights into Formamide Formation through Gas-phase Reactions in the Interstellar Medium Redondo Cristóbal, María del Pilar Barrientos Benito, María Carmen Largo Cabrerizo, Antonio Producción Científica We study the viability of different gas-phase ion–molecule reactions that could produce precursors of formamide in the interstellar medium. We analyze different reactions between cations containing a nitrogen atom (NH+3 , NH+4 , NH3OH+, and NH2OH+) and neutral molecules having one carbonyl group (H2CO and HCOOH). First, we report a theoretical estimation of the reaction enthalpies for the proposed processes. Second, for more favorable reactions, from a thermodynamic point of view, we perform a theoretical study of the potential energy surface. In particular, the more exothermic processes correspond to the reactions of ionized and protonated hydroxylamine with formaldehyde. In addition, a neutral–neutral reaction has also been considered. The analysis of the potential energy surfaces corresponding to these reactions shows that these processes present a net activation barrier and that they cannot be considered as a source of formamide in space. 2017-03-09T08:20:31Z 2017-03-09T08:20:31Z 2014 info:eu-repo/semantics/article The Astrophysical Journal, Volume 780, Issue 2, article id. 181, 7 p. (2014) 0004-637X http://uvadoc.uva.es/handle/10324/22505 10.1088/0004-637X/780/2/181 The Astrophysical Journal 780 eng http://iopscience.iop.org/journal/0004-637X info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ © The American Astronomical Society Attribution-NonCommercial-NoDerivatives 4.0 International American Astronomical Society SI