Knowledge Bank

The absolute intensities of fundamental and overtone bands in IR absorption spectra for HCl disolved in liquid $CO2$ were measured. The multiple growth of fundamental band integral intensity and some decrease (by 20%) of overtone band intensity for HCl under phase transition gas-liquid solution were discovered. The mechanisms of the intensity formation for studied spectra are discussing. It was carried out the nonempiric quantum chemical calculations of intermolecular interactions in $HF-CO2$ and $HCl-CO2$ complexes. Calculated and experimental data on electrooptic parameters and intensities of IR absorption spectra for studied systems are comparing and discussing.