Fig. 3.

Solvation free energies of images on MEPs that connect the hydration states 1s-dry (I), 2s-dry (IV), and 2s-wet (VI) (shown at Bottom) with transition states (II), (III), and (V) (shown at Top) and the transition energy barriers for $z=6$ Å. In Middle plots, the horizontal axis is the string parameter $\alpha$.