The Raman Spectrum of Heavy Chloroform

The Raman spectrum of chloroform made from deuterium has been photographed and the line shifts measured. The three types of isotope effects observed in the spectrum of heavy chloroform have been discussed. By treating different groups of atoms in the molecule as entities satisfactory agreement between calculated and observed values for the isotope displacements can be secured. Some idea of the nature of the role played by the chlorines in the C-H "bending" and "stretching" vibrations is obtained.