Substituted Methanes. XXII. Infrared Spectra of CHBrF2, and Potential Constants and Calculated Thermodynamic Properties of CHBrF2 and CDBrF2

Abstract

The near infrared spectrum of gaseous bromodifluoromethane was obtained using a Perkin‐Elmer Model 21 Spectrometer equipped with a NaCl prism. A set of potential constants was determined for CHBrF₂ by means of the Wilson FG matrix method, using a potential energy function with all possible second degree terms. The same potential constants were used to calculate the fundamentals of CDBrF₂. Finally the heat content, free energy, entropy, and heat capacity were calculated for 12 temperatures from 100 to 1000°K, for the ideal gaseous state at 1 atmos pressure, using the observed fundamentals for CHBrF₂ and the calculated ones for CDBrF₂.