Infrared Spectra and Vibrational Potential Function of the Perpendicular Vibrations of CHF3 and CDF3

Abstract

Infrared spectra of the perpendicular bands of CHF₃ and CDF₃ have been examined at high resolution. The ${\nu }_4$ band of CHF₃ and the ${\nu }_5$ band of CDF₃ were resolved and Coriolis constants and band centers determined. The measured band shapes of the ${\nu }_6$ bands permitted Coriolis constants to be calculated. These data were then used to calculate the E‐species force constants of the general harmonic potential function. Normal coordinates were also calculated.