The Fundamental Frequencies of Certain Trihalomethanes

Abstract

The Raman spectra of dibromochloro‐, bromo‐dichloro‐, dichlorofluoro‐, chlorodifluoro‐, dibromofluoro‐ and bromochlorofluoro‐methane have been studied. Their fundamental frequencies have been correlated and systematized. Simple graphical means were used to predict the Raman frequencies of CHBrF₂ and CHF₃. It was found that the C—X bond will show a ``characteristic'' frequency whenever the halogen X is the only and lightest of this type in a halomethane.