Third, we find that for solvated polypeptides, there is hardly any correlation between the local-mode frequencies predicted by the considered vibrational maps and the quantumchemical reference data. Only for the Jansen map, there is some correlation for the helical polyalanine test cases. This is in stark contrast to the situation for the isolated polypeptides, and indicates that the electrostatic maps are not able to model the effect of the electrostatic environment of the solvent on the local-mode frequencies. Thus, we believe there is a need to revisit these electrostatic maps.