MICROWAVE SPECTRUM, DIPOLE MOMENT, AND INTERNAL ROTATION OF ETHYL $SILANE^{*}$
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Date
1960
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Ohio State University
Abstract
“Type $a$ and $b$ rotational transitions of five isotopic species of ethyl silane have been measured and assigned. The splitting of transitions due to coupling of overall and internal rotation is too small to be resolved for the ground state transitions of this molecule. However, doublets belonging to an excited torsional state have been observed in the spectrum of $CH_{3}CH_{2}SiH_{3}$. From the doublet spacings the barrier to internal rotation about the C-Si bond is calculated to be $1940 \pm 40$cal/mole. Transitions arising from excited torsional states of the methyl group have not as yet been assigned. Stark effect measurements on $CH_{3}CH_{2}SiH_{3}$ yield for $\mu_{a}, \mu_{b}$, and $\mu$ the values 0.72, 0.36, and 0.81 D respectively. Some structural information has been obtained, but the data obtained to date are not sufficient to calculate the complete structure of ethyl silane.”
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$^{*}$This research was made possible by a grant from the National Science Foundation.
Author Institution: Department of Chemistry, University of Notre Dame
Author Institution: Department of Chemistry, University of Notre Dame