Absolute infrared intensities of binary mixtures of liquid chlorobenze
ne and toluene were determined from transmission measurements. In gene
ral, the integrated intensities between isosbestic points of the <(nu)
over tilde>alpha(m) '' spectra were linear with respect to the mole fr
action of the pure components. The alpha(m) '' spectra of the pure liq
uids were curve-fitted with bands of classical damped harmonic oscilla
tor shape. For most fundamentals, the experimental spectra of the mixt
ures and synthetic spectra obtained by mixing data from the fitted ban
ds of the pure components agreed to within 2-4%. Larger deviations (7-
15%) occurred for some of the bands, indicating molecular interaction
between chlorobenzene and toluene.