2014ApJ...793...32R

Query : 2014ApJ...793...32R

2014ApJ...793...32R - Astrophys. J., 793, 32 (2014/September-3)

Peptide bond formation through gas-phase reactions in the interstellar medium: formamide and acetamide as prototypes.

REDONDO P., BARRIENTOS C. and LARGO A.

Abstract (from CDS):

A theoretical study of the reactions of NH₄⁺ with formaldehyde and CH₅⁺ 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.

Abstract Copyright: ∼

Journal keyword(s): astrobiology - astrochemistry - ISM: kinematics and dynamics - ISM: molecules - molecular processes

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	NAME Sgr B2 (North)	Rad	17 47 20.2	-28 22 21						~	742	1

Query : 2014ApJ...793...32R

Basic data :

NAME Sgr B2 (North) -- Radio Source
Other object types:	`Rad (DGSW,[MD72])`, `IR ([GBM93])`
ICRS coord. (ep=J2000) :	`17 47 20.2 -28 22 21 (Radio) [ ] E ~`
FK4 coord. (ep=B1950 eq=1950) :	`17 44 10.4 -28 21 19 [ ]`
Gal coord. (ep=J2000) :	`000.6773 -00.0290 [ ]`

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`NAME Sgr B2 (N)`	`NAME Sgr B2 (North)`	`NAME Sgr B2(N)`	`[MD72] 4`
`DGSW 68`	`NAME Sgr B2 FIR 1`	`[GBM93] FIR 1`

References (742 between 1850 and 2026) (Total 742)
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