Infrared spectra of bromochloromethane, dibromomethane, tribromochloromethane, and tetrabromomethane

Abstract

Th e infrared sp ectra of bromochloI'omethane, dibromomethane, tribromochloI'omethane, and tetrabromomethane have been mea ured from 2 to 36 microns. By the use of the res ults of other workers in Raman spectra it has been possibl e to classify all the strong bands that have been observed. Many of the weaker bands were classified as combination a nd overtone. Only a few of the bands of tetrabromom ethane were observed , on account of t he breakin g down of the compound in solutions of carbon disulfid e and carbon tetrachloride. The in tense bands of dibromom etha ne and tetrab romomethane were measured in the vapor state. Th e infrared absorption bands of these com pounds had not prev iou ly b ee n m ea sured over an exte nd ed range of wavelength , and these meas uremen ts were under taken to d etermine t he po itions of weak bands 0 that a more complete classifi cation of the sp ectra of t hese m olecule co uld be made.