A closer data examination led to a series of mechanistic insights. First, when a C-H bond is present in NBP-H, the degradation by SO4 -• was much more efficient than by HO•. At the lowest [S2O8 2-]:[NBP-H] ratio of 10:1, SO4 -• led to 97.3% degradation of the parent NBP-H, while HO• merely resulted in 66.2% degradation. The defluorination from the degraded portion of NBP-H by