The Infra-Red Spectrum of Methyl Fluoride

All of the important bands in the spectrum of methyl fluoride except the 8μ (1200 ${\mathrm{cm}}^{-1\mathrm{}}$) band, have been remeasured under considerably higher resolution than that available to Bennett and Meyer. In this work the parallel bands as well as the perpendicular bands have been resolved. The approximate average spacing between lines in the $P$ and $R$ branches of the parallel type bands was found to be about 1.7 ${\mathrm{cm}}^{-1\mathrm{}}$. New and more precise determinations of band centers and molecular constants have been achieved.