Infrared Absorption Spectra of Chromyl Fluoride and Chromyl Chloride

Abstract

The infrared absorption spectra of gaseous chromyl fluoride and gaseous chromyl chloride have been investigated. The region investigated for chromyl fluoride was 2 to 36 μ while that for chromyl chloride was 2 to 25 μ. Six fundamental and nineteen first overtone or binary combination bands have been observed in the spectrum of chromyl fluoride, the fundamental bands being located at 274, 304, 727, 789, 1006, and 1016 cm^—1. The observed transitions have been assigned on the basis of a tetrahedral model of C_2v symmetry. From the observed spectrum it was possible to estimate the probable positions of the three remaining fundamental bands. The observed spectrum of chromyl chloride included four fundamental bands located at 475, 499, 990, and 1000 cm^—1 and one first overtone or binary combination band located at 1980 cm^—1.