Chiral glycine formation on cold interstellar grains by quantum tunneling hydrogen-deuterium substitution reactions

  • Oba Y
  • Watanabe N
  • Osamura Y
 et al. 
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Abstract

We report experimental evidence that chiral glycine (NH2CHDCOOH) is formed by the surface reaction of normal glycine (NH2CH2COOH) solid with deuterium (D) atom at 12 K under the simulative conditions of interstellar molecular clouds. Chiral glycine formation is most likely initiated by the tunneling abstraction reaction of H atom by D atom followed by the addition of D atom to the glycine radical (NH2CHCOOH). Given that chiral glycine can form in such a primordial low-temperature environment, it might source molecular chirality as molecular clouds evolve into planetary systems.

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Authors

  • Yasuhiro ObaInstitute of Low Temperature Science, Hokkaido University

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  • Naoki Watanabe

  • Yoshihiro Osamura

  • Akira Kouchi

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