DIELECTRIC-SPECTROSCOPY AND MOLECULAR-DYNAMICS OF CH3CL CCL4 LIQUID SOLUTIONS/

Power absorption coefficient has been measured for CH3Cl/CCl4 solution s as a function of concentration and temperature over the 0-THz freque ncy range. The refractive index has also been measured for frequencies up to 400 GHz. The spectroscopic results are well described by the co nfined rotator model and the temperature and concentration dependence of the derived parameters is typical of polar solutes in non-polar sol vents. The most interesting feature of the experimental results is the existence of some excess absorption over that predicted by the model. This additional band is situated in the millimetre wavelength range a nd intensifies with increasing fraction of non-polar molecules. It is postulated that this additional absorption is due to induced dipoles g enerated by translational motion of molecules.