Comparison of the Raman Spectra of 1,1,1- and 1,1,2-Trichloroethane

The Raman frequencies of 1,1,1- and 1,1,2-trichloroethane have been obtained. Comparison with CCl4 indicates that the Cl3C and Cl2HC radicals have tetrahedral symmetry. The frequencies of Cl3C–CH3 and Cl2HC–CH2Cl are compared, and the combination frequencies and modes of vibration of the two molecules indicated.