Infrared absorption cross-sections and integrated absorption intensities of perfluoroethane and cis-perfluorocyclobutane

Absorption cross-sections and integrated absorption intensities for the principal infrared bands of perflouroethane (C-2 F-6) and cis-perfluorocyclobutane (c-C-4 F-8) vapours have been derived from quantitative laboratory measurements of their spectra. Fourier transform spectroscopy using a resolution of 0.03 cm(-1) over the spectral range 500-1900 cm(-1) was employed. Measurements on pure vapour, and vapour/air mixtures were made, at sample temperatures between 203 and 293 K. Comparisons between these measurements and previously reported values have been made. (C) 2000 Elsevier Science Ltd. All rights reserved.