FTMW spectroscopy of the methyl-vinyl Criegee intermediate

Endo, Yasuki

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https://hdl.handle.net/2142/104266 Copy

Description

Title

FTMW spectroscopy of the methyl-vinyl Criegee intermediate

Author(s)

Endo, Yasuki

Contributor(s)

• Lee, Yuan-Pern
• Chung, Chen-An

Issue Date

2019-06-20

Keyword(s)

Atmospheric science

Abstract

Pure rotational transitions of the methyl-vinyl Ciregee intermediate have been observed by FTMW spectroscopy. The species was produced by discharging a mixture, 1,3-diiodo-but-2-en and O$_2$ diluted in Ar. Among four possible isomers for this species with energy less than 3 kcal/mol, only the lowest energy isomer, the \textit{syn-trans} isomer was detected. Thirty rotational transitions with internal rotation splitting for the methyl top were observed. The observed frequencies were analyzed by the XIAM program,$^1$ yielding the rotational constants, which agree very well for the lowest energy isomer, giving definite assignment of the isomer observed. Furthermore, the internal rotation barrier was determined to be 702.8(28) cm$^{-1}$, which also reasonably agrees with that of an \textit{ab initio} calculation 680 cm$^{-1}$ at CCSD(T)/cc-pVTZ. \vspace{1em}\noindent 1. H. Hartwig and H. Dreizler, Z. Narturforsch. A 51, 923 (1996).

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/104266

DOI

https://doi.org/10.15278/isms.2019.RJ06

Copyright and License Information

Copyright 2019 Yasuki Endo

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