The Near Infrared Absorption Spectra of Some Halogen Derivatives of Methane

The infrared absorption spectra of C${\mathrm{H}}_3$Cl, C${\mathrm{H}}_3$Br, and C${\mathrm{H}}_3$I, in vapor form, were measured from 1.5μ to 3.0μ. The fine structure of bands in the 2.3μ region was resolved in the first order. The fine structure of bands in the 1.6μ region was resolved in the second order, but not in the first. Seven bands were found.