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

Carlos Cabezas; Jean-Claude Guillemin; Yasuki Endo

doi:10.1063/1.5088566

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

J Chem Phys. 2019 Mar 14;150(10):104301. doi: 10.1063/1.5088566.

Authors

Carlos Cabezas¹, Jean-Claude Guillemin², Yasuki Endo¹

Affiliations

¹ Department of Applied Chemistry, Science Building II, National Chiao Tung University, 1001 Ta-Hsueh Rd., Hsinchu 30010, Taiwan.
² Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR6226, F-35000 Rennes, France.

PMID: 30876361
DOI: 10.1063/1.5088566

Abstract

Four conformers of the n-propyl-substituted Criegee intermediate, CH₃CH₂CH₂CHOO, 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/O₂ 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 ((CH₃)₂CHCHOO), and methyl-ethyl-ketone oxide (C₂H₅C(CH₃)OO), for which syn and anti species have been observed coexisting in the gas phase.