University of Illinois Urbana-Champaign

Millimeter And Submillimeter Spectroscopy Of Isobutene

Fatima, Mariyam

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WN08_1.pptx
6030.pdf

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

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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
Genre of Resource
Conference Paper / Presentation
Language
eng
Handle URL
https://hdl.handle.net/2142/116539
DOI
https://doi.org/10.15278/isms.2022.WN08
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Copyright 2022 held by the authors

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Abstracts & Presentations - 2022 International Symposium on Molecular Spectroscopy PRIMARY