Figure 2.
(a) QM and MM interaction energies between water and 5-cyanoindole as a function of the CN--H angle when the water is bent out of the indole plane (b) and when the water is kept in the indole ring plane. (c) QM and MM interaction energies as a function of the CN--HOH distance with one of the H–O bonds aligned with the nitrile group. Example geometries (CN--H angle = 130°) corresponding to the scans in (a) and (b) are shown in panels (d) and (e), respectively.