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Reinvestigation of Microwave Spectrum of Ethylsilane: II. Vibrationally Excited States and Internal Rotations

✍ Scribed by Yuzuru Niide; Michiro Hayashi

Publisher: Elsevier Science
Year: 2002
Tongue: English
Weight: 159 KB
Volume: 216
Category: Article
ISSN: 0022-2852
DOI: 10.1006/jmsp.2002.8651

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✦ Synopsis

Microwave spectra of ethylsilane and its three deuterated species in vibrationally excited states have been measured. A leastsquares analysis of the observed frequencies gave rotational constants and three of the quartic centrifugal distortion constants. The barriers to the internal rotation of both the methyl and silyl groups and the coefficients of the potential cross terms were solved from splittings of the multiplets.

The averages of CH 3 and SiH 3 barriers were determined to be 2634 ± 16 and 1992 ± 21 cal/mol and the potential cross terms, V 12 and V 12 , were estimated to be -55 and -111 cal/mol, respectively, for the four species.

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