Crossing of anisotropic and isotropic Raman components in the intermolecular resonance coupling of vibrations. II-LiClO4 and LiI solutions in acetone

Changes in the wavenumbers of the anisotropic and isotropic components of the CO stretching band in the Raman spectrum of LiClO4 and Lil solutions in acetone were investigated. The non‐coincidence values defined as Δν = νaniso – viso of the CO band in LiCIO4 solutions were positive for bulk acetone and negative for the acetone‐shared ion pairs. In LiI solutions, where the separation of bulk acetone was not possible, the non‐coincidence values changed from positive to negative with increasing concentration of LiI. A mechanism for the non‐coincidence changes is proposed.