Absolute Infrared Intensities of the Fundamental Absorption Bands in Solid Carbonyl Sulfide

Absolute infrared intensities for the fundamental absorption bands of COS have been measured in polycrystalline solid films. The path length has been measured by observing interference fringes. The results are in fair agreement with the intensities computed from the gas-phase values, corrected for the simple "field effect," except for the very weak band, v(2). These results, together with those reported earlier for other linear triatomic molecules, are examined critically in a search for patterns of behavior. The "intensity sum rule" for crystals is restated. It is concluded that the spectra of these crystals are good examples of those to be expected for weak "chemical" interactions.