Finally, as the spin density accumulates at the α-carbon dissociation site, r g shrinks, and 3.0 Å in which the hydrated electron interacts with the PFAS molecule. Nevertheless, in trajectories 05 and 04 for PFOA and PFOS, respectively, the cavity remains predominantly on the surface of the cluster, in accordance with previous studies of solvated electrons in similar systems. We also calculated several statistical properties of the hydrated electron to provide insight into its reactivity with PFOA and PFOS. Figure strongly bound to the e - aq cavity in the solvated PFOS system compared to PFOA. As such, these strong interactions between the hydrated electron with the water molecules result in a reduced reactivity with PFOS.