We have shown that ∆𝐺 ‡ does not depend on the size of the confining pore or the density of (SiOH) x , because ∆𝐺 ‡ corresponds to the free energy required to exchange electrons between Ti-OOH species and the C=C following all changes to the configuration of the alkene and solvent. Alkenes preferentially associate with hydrophobic, siloxane regions of the pores upon adsorption within the zeolite; therefore, values of ∆𝐺 primarily reflect differences in the characteristic pore size and do not depend significantly on (SiOH) x density. Then, this framework suitably attributes all changes in ∆𝐺 ‡ caused by solvent restructuring about the transition state complex to the excess interaction between that transition state and surrounding solvation shells, which ∆𝐺 captures. The hydrophobic Ti-zeolites contain exceedingly few (SiOH) x proximate to Ti active sites, and as such, the local solvent structures predominantly consist of non-hydrogen bonded CH 3 CN molecules that require insignificant reorganization energies and offer a convenient point of reference. As such, we set the ∆𝐺 of Ti-zeolite-F materials to be equal to zero for the purposes of these comparisons. This analysis provides differences between ∆𝐺 ‡ that for a given zeolite topology reflect the disruption and reorganization of H 2 O molecules near Ti active sites within the hydrophilic Ti-zeolites.