Thus, there were cases where the environment did not contribute particularly strongly to a normal mode, but still substantial changes in the intensity were observed. Regarding the angular deviations, they were mainly observed in the low-frequency part of the Thus, the vibrational motions of the QM subsystem in the other parts of the spectrum were largely unaltered. Although the environmental contributions were also most prominent in the low-frequency part, there were, in some cases, also substantial contributions to the higher-frequency modes. The expanded QM subsystem did not have any negative effect on the local normal modes of the solute compared to the non-expanded QM subsystem.