Add time:08/21/2019         Source:sciencedirect.com

The pure rotational spectrum of 1,2-dimethoxyethane was measured in the 6–18 and 59.6–74.4 GHz frequency ranges using a cavity-based pulsed jet Fourier transform microwave spectrometer and a Stark modulated free-jet millimeter-wave absorption spectrometer, respectively. Two conformers, TGT and TGG′, have been identified, together with their mono-substituted 13C isotopologues. Each rotational transition is split into several components due to the two methyl groups internal rotations. The corresponding V3 barriers have been experimentally determined. MP2/6-311++G(d,p) calculations have provided the determination of the conformational stabilities, structures and spectroscopic parameters.

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