Infrared dispersion studies

Absorption spectra and dispersion curves have been obtained for dichloro-, dibromo- and diiodomethane in the liquid phase between 500 and 20 cm−1 using interferometric and Fourier spectroscopic techniques. The refractive index data extend existing information on these molecules to include all infrared active fundamental modes. Dispersion curves have also been obtained for deuterated dichloro- and dibromomethane, in the liquid phase, between 5000 and 450 cm−1. The refractive indices have been used to calculate absolute band intensities, dipole moment derivatives and vibrational polarizations.