Microwave-wave spectroscopy of 5-methyl hydantoin

Ozeki, Hiroyuki

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https://hdl.handle.net/2142/104323 Copy

Description

Title

Microwave-wave spectroscopy of 5-methyl hydantoin

Author(s)

Ozeki, Hiroyuki

Contributor(s)

• Kobayashi, Kaori
• Awatsu, Minami

Issue Date

2019-06-18

Keyword(s)

Astrochemistry and astrobiology in the age of Atacama Large Millimeter/submillimeter Array (ALMA)

Abstract

Hydantoin (Imidazolidine-2,4-dione, \chem{C_3H_4N_2O_2} is a five-membered heterocyclic compound, and has been regarded as a direct precursor of glycine, the simplest amino acid. The molecule was detected in carbonaceous chondrites together with several kinds of amino acids.\footnote{A. Shimomiya, and R. Ogasawara, Orig. Life Evol. Biosph. 32, 165 (2002)} We have measured pure rotational spectrum of the molecule in its ground and vibrationally excited states, and have provided the molecular line frequency list in the millimeter-wave region for astronomical search.\footnote{H. Ozeki, R. Miyahara, H. Ihara, S. Todaka, K. Kobayashi, and M. Ohishi, Astron. Astrophys. 600 A44 (2017).} 5-methyl hydantoin is the simplest chiral molecule among hydantoins, because either of the hydrogen atoms bonded to the C5 position of the five-membered ring is asymmetrically substituted. The molecule becomes a direct precursor of alanine, the simplest chiral amino acid. We have tried to observe pure rotational spectrum of 5-methyl hydantoin in the millimeter-wave to sub-millimeter-wave region. Guided with quantum chemical calculation, several spectral lines can be assigned to b-type transitions.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/104323

DOI

https://doi.org/10.15278/isms.2019.TG04

Copyright and License Information

Copyright 2019 Hiroyuki Ozeki

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