DISPERSION OF THE MEAN DIPOLE POLARIZABILITY ALPHA(OMEGA) AND DIPOLE POLARIZABILITY ANISOTROPY KAPPA(OMEGA) OF BROMOTRIFLUOROMETHANE CBRF3

Dispersive Fourier transform spectroscopy measurements of the refracti ve index of bromotrifluoromethane, CBrF3, have been performed at press ures up to 10(5) Pa in the wavelength range between 900 and 325 nm, in order to determine the frequency dependence of the mean dipole polari zability alpha(omega). Combining our results with measured depolarizat ion ratios rho(omega) yields a dispersion formula for the two independ ent components of the polarizability tensor alpha perpendicular to(ome ga) and alpha parallel to(omega). The results are used to get estimate s of the dispersion interaction energy constant C-6, the second hyperp olarizability gamma and the mean diamagnetic susceptibility chi of CBr F3. (C) 1997 Elsevier Science B.V.