Vibrational Spectrum of Disilane

Abstract

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.