INTENSITY IN THE RAMAN EFFECT: II. STANDARD RAMAN INTENSITIES AND VIBRATIONAL ASSIGNMENTS IN THE CHLOROETHANES

Abstract

The standard intensities of the Raman bands of the chloroethanes without rotational isomers (Et; 1,1; 1,1,1; 1,1,1,2; penta, and hexa) have been measured in the liquid phase with a photoelectrically recording Raman spectrometer. Vibrational assignments are proposed which are consistent with the depolarization data, infrared contours, and a vibrational sum rule. The total Raman intensity is a smooth but nonlinear function of the number of chlorine atoms. The sum of the intensities of the bands assigned to hydrogen modes and that for the skeletal modes is also a smooth function of the number of substituents.