Millimeter And Submillimeter Spectroscopy Of Isobutene

Fatima, Mariyam

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https://hdl.handle.net/2142/116539 Copy

Description

Title

Millimeter And Submillimeter Spectroscopy Of Isobutene

Author(s)

Fatima, Mariyam

Contributor(s)

• Schlemmer, Stephan
• Hoppen, Dirk
• Müller, Holger S. P.
• Zingsheim, Oliver

Issue Date

2022-06-22

Keyword(s)

Astronomy

Abstract

Propene is among the largest saturated or nearly saturated hydrocarbons that have been detected not only toward \mbox{TMC-}1\footnote{N. Marcelino et al., \textit{ApJ} \textbf{665} (2007) L127.}, but also in the warmer environment of the solar-type protostellar system IRAS 16293-2422\footnote{S. Manigand et al., \textit{A\&A} \textbf{645} (2021) A53.}.~Isobutene, also known as 2-methylpropene, (CH$_{3}$)$_{2}$C=CH$_{2}$, is thus a promising candidate to be searched for in space.\\ Its rotational spectrum was studied in the microwave region to some extent\footnote{H. S. Gutowsky et al., \textit{J. Mol. Spec.} \textbf{147} (1991) 91-99 and references therein.}.~In this work, we have extended the measurement up to 370~GHz employing the Cologne (Sub-)Millimeter spectrometer.~The molecule has two equivalent methyl rotors.~The barrier height of the tops is high enough that the internal rotation splittings could either not be resolved or occur as symmetrical triplets.~A few quartets are also assigned, where splittings are up to $\sim$10~MHz. The analysis has been carried out with the ERHAM program\footnote{ P. Groner, \textit{J. Chem. Phys.} \textbf{107} (1997) 4483-4498.} using the previous data as well.~We have accessed transitions up to $J = 60$ and $K_{c} = 41$, greatly improving the spectroscopic parameters for this molecule and thus paving the way to search for it in space.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Handle URL

https://hdl.handle.net/2142/116539

DOI

https://doi.org/10.15278/isms.2022.WN08

Copyright and License Information

Copyright 2022 held by the authors

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