Fourier-transform microwave spectroscopy of dimethyl-substituted Criegee intermediate (CH3)2COO

Masakazu Nakajima; Yasuki Endo

doi:10.1063/1.4973014

Fourier-transform microwave spectroscopy of dimethyl-substituted Criegee intermediate (CH₃)₂COO

J Chem Phys. 2016 Dec 28;145(24):244307. doi: 10.1063/1.4973014.

Authors

Masakazu Nakajima¹, Yasuki Endo²

Affiliations

¹ Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan.
² Department of Applied Chemistry, National Chiao Tung University, 1001 Ta-Hsueh Rd., Hsinchu 30010, Taiwan.

PMID: 28049337
DOI: 10.1063/1.4973014

Abstract

Pure rotational transitions of the dimethyl-substituted Criegee intermediate (dimethyl carbonyl oxide, acetone oxide), (CH₃)₂COO, were observed in the discharge plasma of a C(CH₃)₂I₂/O₂ gas mixture by Fourier-transform microwave spectroscopy. The observed spectra show small splittings due to the internal rotations of the two methyl groups. Precise rotational constants of the molecule and the barrier heights of the methyl internal rotations were experimentally determined.