Vibrational Spectra, Force Constants, and Calculated Thermodynamic Properties of Methyltrifluorosilane

Abstract

The infrared spectrum of gaseous H₃C–SiF₃ has been obtained in the region 2.5—36μ. The Raman spectrum of the liquid phase under pressure has been photographed with a three‐prism glass spectrograph of linear dispersion 15 A/mm at 4358 A, and qualitative polarization measurements have been made. The eleven active fundamental vibration frequencies have been assigned, and a tentative value has been assigned to the inactive fundamental. A normal coordinate analysis has been made, and thermodynamic properties have been calculated.