MILLIMETERWAVE SPECTROSCOPY OF ETHANIMINE AND PROPANIMINE AND THEIR SEARCH IN ORION

Margulﾏs, L.

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Description

Title

MILLIMETERWAVE SPECTROSCOPY OF ETHANIMINE AND PROPANIMINE AND THEIR SEARCH IN ORION

Author(s)

Margulﾏs, L.

Contributor(s)

• Cernicharo, Jose
• Guillemin, J.-C.
• Motiyenko, R.A.

Issue Date

25-Jun-15

Keyword(s)

Astronomy

Abstract

The aldimines are important to understand amino acids formation process as they appear in reaction scheme of Strecker-type synthesis. Following the detection in the ISM of methanimine (CH$_2$NH) in 1973footnote{Godfrey, P. D.; {em et al.} {em Astrophys. Lett.}~{bf13}, (1973) 119} and the more recent one of ethanimine (CH$_3$CHNH)footnote{Loomis, R. A.; {em et al.} {em ApJ. Lett.}~{bf765}, (2013) L9}, we decided to investigate the next molecule in the series: propanimine (CH$_3$CH$_2$CHNH). For this molecule no spectroscopic information was available up to now. We measured the rotational spectrum of propanimine in the frequency range up to 500 GHz. Since the spectroscopic studies of ethanimine were limited to 130 GHzfootnote{Lovas, F. J.; {em et al.} {em J. Chem. Phys.}~{bf72}, (1980) 4964}, we also extended the measurements up to 300 GHz. The spectra of both E- and Z- isomers are analyzed for the two molecules. Usually aldimines, which are unstable molecules, are obtained by discharge or pyrolysis methods, here pure sample were obtained by synthesis process.\ For ethanimine, the methyl top internal rotation should be taken into account, therefore the analysis is performed using new version of RAM36 codefootnote{Ilyushin, V.V. et al;{em J. Mol. Spectrosc.}~{bf259}, (2010) 26} which includes the treatment of the nuclear quadrupole hyperfine structure. \ The spectroscopic results and their searches in Orion will be presented.\ em{This work was supported by the CNES and the Action sur Projets de l'INSU, PCMI. This work was also done under ANR-13-BS05-0008-02 IMOLABS}

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

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