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Rotational Spectrum, Internal Dynamics, and Molecular Structure of Methylphenylsilane

Rotational Spectrum, Internal Dynamics, and Molecular Structure of Methylphenylsilane

Juncheng Lei, Junhua Chen, Zhangyou Yang, Gang Feng, Zhining Xia, Qian Gou

J Chem Phys. 2019 Jun 21;150(23):234302.

PMID: 31228918

Abstract:

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP766085	Methylphenylsilane		766-08-5	Price

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