Low-Frequency Vibrations of Some Organotrichlorosilanes

Authors: Durig, J. R.; Hellams, K. L.

Source: Applied Spectroscopy, Volume 22, Issue 3, Pages 153-213 (May/June 1968) , pp. 153-160(8)

Publisher: Society for Applied Spectroscopy

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The far infrared (33–500 cm−1) spectra of a series of organotrichlorosilanes have been recorded. The Raman spectra (0–600 cm−1) have also been measured and the relative intensity and depolarization values of lines are tabulated. The spectra have been interpreted in detail and some low-frequency "group frequencies" are proposed for the SiCl3 moiety. The infrared (3200–33 cm−1) and Raman (0–3200 cm−1) spectra of α-chlorovinyltrichlorosilane have been recorded and a complete vibrational assignment is presented. Torsional oscillations of the SiCl3 group were observed for two of the molecules; barriers of 1.7 kcal/mole and 2.7 kcal/mole were calculated for the motion around the C–Si bonds of the vinyltrichlorosilane and the ethyltrichlorosilane molecules, respectively. The results are briefly discussed. Thermodynamic properties have been calculated for the latter two molecules.

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370268774383543

Affiliations: Department of Chemistry, University of South Carolina, Columbia, South Carolina 29208

Publication date: May 1, 1968

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