AbstractThe only indisputable evidence on the occurrence of amino acids outside our planet is their detection in carbonaceous chondrites. However only a small fraction was found in chemically free state, whereas hydrolyzable derivatives of unknown composition (possibly amides) is a major source of the detectable amino acids. The difference between carbonaceous chondrites and the icy bodies (interstellar ices and comets) is the basic component, which is water in the latter case. Thus, it is reasonable to expect for a higher content of hydrolyzed derivatives (free amino acids as final products) in the icy bodies, as compared to the one in carbonaceous chondrites. As a preliminary test for energetic feasibility of this type of reactions, we studied theoretically the reaction of glycine amide hydrolysis, at the B3LYP/6-31++(d,p) level. We found that a very high activation barrier makes this reaction prohibited. Besides molecular water, a similar hydrolytic effect might be produced by hydroxyl radicals (OH) generated under the ionizing action of cosmic rays. Therefore we tested the reaction of glycine amide with OH radical as well. Nevertheless, although the barrier height decreased significantly, by ca. 30 kcalmol−1, it remained positive.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Glycine amide hydrolysis with water and OH radical: a comparative DFT study


    Contributors:

    Published in:

    Advances in Space Research ; 36 , 2 ; 209-213


    Publication date :

    2004-10-19


    Size :

    5 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Oligo-glycine synthesis in an aqueous solution of glycine under oxidative conditions

    Yamagata, Yukio / Yamashita, Atsunori / Inomata, Katsuhiko | Online Contents | 1980


    Ablative material with a polymeric phosphorylated amide

    CHAFFEY MICHELE L / ROJO ARTHUR | European Patent Office | 2020

    Free access

    Ablative Material with a Polymeric Phosphorylated Amide

    CHAFFEY MICHELE L / ROJO ARTHUR | European Patent Office | 2018

    Free access

    ABLATIVE MATERIAL WITH A POLYMERIC PHOSPHORYLATED AMIDE

    CHAFFEY MICHELE L / ROJO ARTHUR | European Patent Office | 2018

    Free access