Probing the conformational behavior of the doubly substituted methyl-ethyl Criegee intermediate by FTMW spectroscopy

Carlos Cabezas, Jean-Claude Guillemin, Yasuki Endo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Four conformers of the doubly substituted methyl-ethyl Criegee intermediate, C2H5C(CH3) OO, have been observed by Fourier-transform microwave spectroscopy. The transient species was produced using a pulsed electric discharge of a gas mixture of 2,2-diiodobutane/O-2. The conformational preferences differ from those observed previously for related alkyl-substituted Criegee intermediates. The observation of small splittings in the spectra due to the internal rotation of only one methyl group enabled us to determine the barrier heights of the hindered methyl rotation for the four conformers, which have been compared with those reported for other methyl-substituted Criegee intermediates. Published by AIP Publishing.

Original languageEnglish
Article number174304
Number of pages7
JournalJournal of Chemical Physics
Volume146
Issue number17
DOIs
StatePublished - 7 May 2017

Keywords

  • UV ABSORPTION-SPECTRUM
  • EQUILIBRIUM
  • REACTIVITY

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