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Hydrogen atom initiated chemistry.

J H Hong, R S Becker

    Journal of Molecular Evolution
    |June 8, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Photolysis of H2S generated H atoms, initiating reactions that produced amino acids from acetylene and ethylene. This research explores implications for planetary atmosphere chemistry, especially Jupiter's.

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    Area of Science:

    • Astrochemistry
    • Chemical Kinetics
    • Planetary Science

    Background:

    • Hydrogen sulfide (H2S) photolysis is a source of reactive hydrogen (H) atoms.
    • H atoms can initiate complex chemical reactions in gas mixtures.

    Purpose of the Study:

    • To investigate the synthesis of amino acids and other organic compounds from acetylene-ammonia-water and ethylene-ammonia-water mixtures initiated by H atoms.
    • To explore the potential implications for the atmospheric chemistry of planets, such as Jupiter.

    Main Methods:

    • Photolysis of hydrogen sulfide (H2S) to generate hydrogen (H) atoms.
    • Reaction of H atoms with acetylene-ammonia-water and ethylene-ammonia-water mixtures.
    • Analysis of reaction products, including amino acids and thio-compounds.

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    Main Results:

    • Acetylene system produced two amino acids, ethylene, and cyclic thio-compounds without free sulfur.
    • Ethylene system yielded seven amino acids (including an aromatic one), ethane, free sulfur, and linear thio-compounds.
    • Amino acid quantum yields were ~3x10^-5 (ethylene) and ~2x10^-4 (acetylene).

    Conclusions:

    • The study demonstrates H atom-initiated pathways for amino acid and organic synthesis relevant to planetary atmospheres.
    • Findings suggest potential mechanisms for prebiotic chemistry in extraterrestrial environments.
    • The results provide insights into the chemical composition and processes occurring in Jupiter's atmosphere.