Proceedings of the 2021 International Symposium on Molecular Spectroscopy 2021
DOI: 10.15278/isms.2021.ta09
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Steric Effects on Two Methyl Internal Rotations of 2,6- And 3,4-Dimethylfluorobenzene

Abstract: The microwave spectra of two dimethylfluorobenzene isomers, 2,6-and 3,4-, were measured using two pulsed molecular jet Fourier transform microwave spectrometers operating in the frequency range from 2.0 to 40.0 GHz with the goal of quantifying the steric effects on the barriers to internal rotation of the two methyl groups. Due to the internal rotations of two equivalent methyl groups in 2,6-dimethylfluorobenzene a (26DMFB), all rotational transitions split into quartets, while quintets appear for 3,4-dimethyl… Show more

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