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Fourier transform microwave spectroscopy of Criegee intermediates: The conformational behaviour of butyraldehyde oxide

Abstract : Four conformers of the n-propyl-substituted Criegee intermediate, CHCHCHCHOO, also named n-butyraldehyde oxide, have been observed by Fourier transform microwave spectroscopy. The transient species was produced using a pulsed electric discharge of a gas mixture of 1,1-diiodobutane/O diluted in Ar or Ne. The observation of only syn species is in contrast to the results of other previous studies of alkyl-substituted Criegee intermediates, in particular, those for the structural isomers, isobutyraldehyde oxide ((CH)CHCHOO), and methyl-ethyl-ketone oxide (CHC(CH)OO), for which syn and anti species have been observed coexisting in the gas phase.
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Submitted on : Monday, November 25, 2019 - 3:27:59 PM
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C. Cabezas, J.-C. Guillemin, Y. Endo. Fourier transform microwave spectroscopy of Criegee intermediates: The conformational behaviour of butyraldehyde oxide. Journal of Chemical Physics, American Institute of Physics, 2019, 150 (10), pp.104301. ⟨10.1063/1.5088566⟩. ⟨hal-02090005⟩

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