Rotational spectrum, internal dynamics, and molecular structure of methylphenylsilane

The rotational spectra of two isotopologues of methylphenylsilane were measured and assigned by using the supersonic-jet Fourier transform microwave spectroscopic technique in the 2.0–20.5 GHz range. The feature of rotational spectra of methylphenylsilane indicates that the doublets of rotational tr...

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Published in:The Journal of chemical physics 2019-06, Vol.150 (23), p.234302-234302
Main Authors: Lei, Juncheng, Chen, Junhua, Yang, Zhangyou, Feng, Gang, Xia, Zhining, Gou, Qian
Format: Article
Language:English
Subjects:
Ethylbenzene
Fourier transforms
Molecular structure
Rotation
Rotational spectra
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description The rotational spectra of two isotopologues of methylphenylsilane were measured and assigned by using the supersonic-jet Fourier transform microwave spectroscopic technique in the 2.0–20.5 GHz range. The feature of rotational spectra of methylphenylsilane indicates that the doublets of rotational transitions in methylphenylsilane are contributable to the methyl internal rotation with a V3 barrier of 559 (25) cm−1. No splitting has been observed due to the methyl internal rotation in its carbon analog, ethylbenzene, which indicated that the barrier to such motion should be higher than 700 cm−1. Silicon incorporation of the ethyl group in ethylbenzene leads to a much lower barrier to the methyl internal rotation.
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subjects Ethylbenzene
Fourier transforms
Molecular structure
Rotation
Rotational spectra
title Rotational spectrum, internal dynamics, and molecular structure of methylphenylsilane
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