Vibrational Spectrum of Disilane

Raman spectra of the liquid and infrared spectra of the gaseous phase have been obtained for Si2H6 and Si2D6. With the exception of the torsional mode all fundamental frequencies have been observed and assigned to the proper normal modes. The coarse rotational structure of the perpendicular bands, ν8 and ν9, has been resolved and the corresponding Coriolis coupling coefficients determined. Comparisons with the spectra of ethane and digermane have been made.