Abstract
The infrared absorption spectrum of gaseous CF2:CBr2 has been obtained with a Perkin-Elmer Model 112 double-pass spectrometer equipped with NaCl and CsBr prisms and with a 1—m cell. The Raman spectrum of the compound in the liquid state has been photographed with a 3-prism glass spectrograph of linear dispersion 15 A/mm at 4358 A. Polarization ratios were measured for the stronger Raman bands. The 12 fundamental vibrational wave numbers have been assigned as follows: 1718 (a1), 1307 (b1), 1005 (a1), 898 (b1), 598 (a1), 572 (b2), 399 (b1), 390 (b2), 324 (a1), 203 (a1), 168 (b1), and 151 (a2) cm—1. The 3 lowest are for the liquid, the others for the gaseous state. The observed spectra have been interpreted in detail. Thermodynamic properties of the compound in the ideal-gaseous state have been calculated for 4 temperatures above the boiling point.
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