C.D.S. - SIMBAD4 rel 1.7 - 2020.02.24CET13:23:19

2019MNRAS.485.5210K - Mon. Not. R. Astron. Soc., 485, 5210-5220 (2019/June-1)

Formation of methyl ketenimine (CH3CH = C = NH) and ethylcyanide (CH3CH2C≡N) isomers through successive hydrogenations of acrylonitrile (CH2 = CH - C≡N) under interstellar conditions: The role of CH3C°H - C≡N radical in the activation of the cyano group chemistry.


Abstract (from CDS):

Possible formation routes of interstellar amino acids have been proposed where the first step consists in the transformation of organic nitriles (RCH2 - C≡N) into ketenimines (RCH = C = NH). Such a transformation shows high-energy barriers and needs energetic processing to occur. We show in this study that the CN bond could be activated through H-addition reactions to form ketenimines when starting from organic α, β-unsaturated nitriles (C≡N). Consequently, both methyl ketenimine CH3CH = C = NH and ethylcyanide CH3CH2C≡N might have their origin from H2C = CH - C≡N + 2H reaction occurring on the interstellar icy grains. During the hydrogenation of H2C = CH - C≡N ice under interstellar conditions, CH3CH2C≡N has been formed with an abundance 10 times higher than that of CH3CH = C = NH. Our measurements lead us to conclude that such a distribution would be directly linked to the π-electrons delocalization H3C - C°H - C≡N - H3C - CH = C = N° occurring during the reduction of the CC double bond of acrylonitrile.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): astrochemistry - methods: laboratory: solid state - techniques: spectroscopic - ISM: molecules

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
1 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1337 0
2 NAME Sgr B2 (North) Rad 17 47 20.2 -28 22 21           ~ 504 1
3 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 1879 1

    Equat.    Gal    SGal    Ecl

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