Add time:09/09/2019         Source:sciencedirect.com

The infrared and Raman spectra of dichloromethylvinylsilane, CH2CHSiCl2CH3, were measured in the liquid and solid states. An assignment of the fundamental vibrations was given on the basis of the comparison of the relative intensities between the infrared and Raman bands, depolarization ratios and group wavenumbers. This assignment was supported by a normal coordinate calculation. Two rotational isomers of the cis (C) and skew (S) about the CSi axis were found to coexist in the liquid state, while only the C form persisted in the solid state. The C form was more stable than the S form in the liquid state by 90 ± 30 cal mol−1. From the solvent effect of the infrared spectra, the C form was found to be more polar than the S form and the SiCHCH2 group moment was in the direction of −(Si)(CHCH2)+.

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