Optical constants and integrated intensities of liquid hexafluorobenzene between 4000 and 250 cm−1 at 25 °C

Abstract

The optical constants (real and imaginary refractive indices) of hexafluorobenzene were determined at 25°C via transmission measurements. Experimental absorbance spectra measured on a Nicolet Impact 410 FTIR were converted to imaginary refractive indices using methods described in the literature. The real refractive indices were obtained by Kramers–Kronig transformation of the imaginary refractive indices. From the complex refractive indices, the molar absorption coefficient (Em) and complex molar polarizability (α̂m) spectra were calculated. The integrated intensities for the E1u fundamentals were obtained from the areas under the bands in the ν̃α″m spectrum. These integrated intensities are compared to those for benzene and benzene-d6 in the literature.