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Spectra and Structure of Silicon-Containing Compounds. XII. Infrared and Raman Spectra of Trimethylvinylsilane and Trimethyl-d9-vinylsilane

Volume 34, Number 1 (Feb. 1980) Page 60-65

Durig, J.R.; Natter, W.J.; Johnson-Streusand, M.


The Raman spectra (0 to 3300 cm-1) of (CH3)3Si(CHCH2) and (CD3)3Si(CHCH2) in the gaseous, liquid and solid states have been recorded. The infrared spectra (20 to 3300 cm-1) of the same two compounds in the gaseous and solid states have also been recorded. A vibrational assignment based upon depolarization ratios, frequency shifts with isotopic substitution, infrared band contours, and group frequencies is proposed. The SiC3 torsion was observed at 55 and 50 cm-1 for the "light" and "heavy" molecules, respectively, and the barriers to internal rotation were calculated to be 0.73 kcal/mol and 0.64 kcal/mol for the light and heavy compounds, respectively. These results are compared to the corresponding data for similar molecules.