Raman and Infrared Spectra of CF3Br and CF3I

The Raman spectra of CF3Br and CF3I have been obtained at —100°C and —40°C, respectively. The infrared spectra of both compounds have been obtained at 30°C, and some measurements have been made at 160°C. The observed frequencies were assigned to the fundamental modes of vibration, their combinations and differences. The frequencies were interpreted in correlation with other CF3X molecules in terms of the pertinent ``natural'' frequencies of vibration.