Extended analysis of the rotational spectrum of methoxyisocyanate in the ground and lowest excited vibrational states

Motiyenko, R.A.

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https://hdl.handle.net/2142/104326 Copy

Description

Title

Extended analysis of the rotational spectrum of methoxyisocyanate in the ground and lowest excited vibrational states

Author(s)

Motiyenko, R.A.

Contributor(s)

• Guillemin, J.-C.
• Margulès, L.
• Pienkina, A.

Issue Date

2019-06-18

Keyword(s)

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

Abstract

"Methoxyisocyanate, \chem{CH_3ONCO} is a methoxy derivative of isocyanic acid HNCO detected in the interstellar medium back in 1972\footnote{Snyder, L.E. and Buhl, D. 1972, $ApJ$, \textbf{177}, 619}. Recent detections of methyl isocyanate, a methyl derivative of HNCO, towards Sgr B2(N)\footnote{Halfen, D.T., Ilyushin, V.V. and Ziurys, L.M. 2015, $ApJ$, \textbf{812}, L5}, and in the Orion\footnote{Cernicharo, J. et al. 2016, \textit{A\&A}, \textbf{587}, L4}, as well as the detection of methoxymethanol\footnote{McGuire, B.M. 2017, $ApJ$ \textbf{851}, L46 (2017)} motivated us to study the rotational spectrum of \chem{CH_3ONCO} as a candidate molecule for searches in the interstellar medium. The previously presented study of the rotational spectrum of methoxyisocyanate\footnote{Pienkina, A. et al. 2017, 72nd ISMS, WA03} showed the complexity of the problem owing to the large amplitude motion, a skeletal torsion along ON bond. The analysis revealed the existence of the ""ladder"" Coriolis-type interactions between the ground and lowest skeletal torsional states. We present here the extension of the rotational spectrum analysis that includes new types of resonances as well as the assignment of new excited vibrational states of methoxyisocyanate. In particular, the inclusion of new resonances permitted to assign and fit within experimental accuracy high $K_a$ transitions of the ground vibrational state. \emph{This work was supported by the CNES and the Action sur Projets de l’INSU, PCMI.}"

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/104326

DOI

https://doi.org/10.15278/isms.2019.TG08

Copyright and License Information

Copyright 2019 R.A. Motiyenko

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