submillimeter wave spectroscopy of acetyl isocyanate : CH3C(O)NCO

Margulès, L.

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https://hdl.handle.net/2142/50960 Copy

Description

Title

submillimeter wave spectroscopy of acetyl isocyanate : CH3C(O)NCO

Author(s)

Margulès, L.

Contributor(s)

• Ilyushin, V.
• Kleiner, Isabelle
• Jabri, Atef
• Cernicharo, Jose
• Tercero, Belén
• Guillemin, J.-C.
• Motiyenko, R.A.

Issue Date

2014-06-18

Keyword(s)

Mini-symposium: Astronomical Molecular Spectroscopy in the Age of ALMA

Abstract

Except isocyanic acid detected in the ISM since 1972\footnote{Snyder, L. E.; and Buhl, D.{\em Astrophys. J.} ~{\bf177}, (1972) 619}, the organo isocyanate derivatives are poorly studied in the millimeter wave domain. This lack of data could be the reason of their non detection in the ISM up to now. We decided to investigate the \chem{C_3H_3NO_2} isomer: acetyl isocyanate. Previously measured up to 40 GHz \footnote{Landsberg, B.M.; and Iqbal, K.{\em J.C.S. Faraday II}~{\bf76}, (1980) 1208}, the cis-conformer exhibits internal rotation motion with a medium barrier value of 360 \wn. The trans conformer conformer is calculated to have an energy of 12.55 kJ.mol$^{-1}$ (1060 \wn) higher than the cis one\footnote{Uchida, Y.; Toyoda, M.; Kuze, N.; and Sakaizumi, T.{\em J. Mol. Spectrosc.}~{\bf256}, (2009) 163} and is not studied here. The measurements were performed in Lille with our solid state devices spectrometer up to 500 GHz. The sample was found to have a poor stability and reacts fastly with metal parts. We should repeat measurements using a flow and a pyrex cell in order to have satisfactory signal to noise ratio. The analysis was performed with RAM36 code\footnote{Ilyushin, V.V. et al;{\em J. Mol. Spectrosc.}~{\bf259}, (2010) 26} which used the Rho Axis Method. The first results and its searche 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 Ukrainian-French CNRS-PICS 6051 project and ANR-13-BS05-0008-02 IMOLABS}

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/50960

DOI

https://doi.org/10.15278/isms.2014.WF10

Copyright and License Information

Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/

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