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How a usual carbamate can become an unusual intermediate: a new chemical pathway to form glycinate in the interstellar medium

Authors

  • Jean-Baptiste Bossa,

    1. Physique des Interactions Ioniques et Moléculaires, UMR 6633, Université de Provence et CNRS, Centre de St Jérôme, case 252, 13397 Marseille cedex 20, France
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  • Fabien Borget,

    Corresponding author
    1. Physique des Interactions Ioniques et Moléculaires, UMR 6633, Université de Provence et CNRS, Centre de St Jérôme, case 252, 13397 Marseille cedex 20, France
    • Physique des Interactions Ioniques et Moléculaires, UMR 6633, Université de Provence et CNRS, Centre de St Jérôme, case 252, 13397 Marseille cedex 20, France.
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  • Fabrice Duvernay,

    1. Physique des Interactions Ioniques et Moléculaires, UMR 6633, Université de Provence et CNRS, Centre de St Jérôme, case 252, 13397 Marseille cedex 20, France
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  • Patrice Theulé,

    1. Physique des Interactions Ioniques et Moléculaires, UMR 6633, Université de Provence et CNRS, Centre de St Jérôme, case 252, 13397 Marseille cedex 20, France
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  • Thierry Chiavassa

    1. Physique des Interactions Ioniques et Moléculaires, UMR 6633, Université de Provence et CNRS, Centre de St Jérôme, case 252, 13397 Marseille cedex 20, France
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Abstract

Experiments on the thermal reactivity of carbon dioxide (CO2) and methylamine (CH3NH2) are reported and show methylammonium methylcarbamate (CH3NHCOO CH3NHmath image) and methylcarbamic acid (CH3NHCOOH) are formed at low temperature in solid environment. The VUV (λ > 120 nm) irradiation of carbamate induces the formation of methylammonium glycinate (MAG). Calculations have been performed to give an insight on the pathway for the formation of the methylcarbamic acid (MCA). These calculations show that the methylamine environment play an important role in the barrier and a cooperative effect of the methylamine molecules has to be taken into account. The implication on the interstellar reactivity is also discussed because this pathway to form glycinate can occur in interstellar ices. Copyright © 2010 John Wiley & Sons, Ltd.

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