Substituted Methanes. XVI. Vibrational Spectra, Potential Constants, and Calculated Thermodynamic Properties of Dibromodifluoromethane

Abstract

Raman displacements, semiquantitative relative intensities, and quantitative depolarization factors of liquid CBr₂F₂, and infrared wave numbers and the percent transmission in the region 450–4000 cm⁻¹ for gaseous CBr₂F₂ have been obtained. Satisfactory assignments were made for all the observed bands. Using the Wilson FG matrix method, with a potential function containing all possible second‐degree terms, reasonable values of the potential constants were calculated. Finally, the heat content, free energy, entropy, and heat capacity for the ideal gaseous state at 1 atmos pressure were calculated for 12 temperatures, from 100 to 1000°K, using a rigid rotator, harmonic oscillator approximation.