(a) Reaction of MnV(O)(ttppc) and 2,4-DTBP. (b) Time-resolved UV–vis spectral changes for the reaction between MnV(O)(ttppc) and 2,4-DTBP. Inset: change in absorbance vs time for the growth of MnIII(ttppc) (660 nm) (green circles). (c) Plots of kobs versus [2,4-DTBP-OH] (black circles) and [2,4-DTBP-OD] (red squares). (d) Reaction of MnIV(OH)(ttppc) and 2,4-DTBP. (e) Time-resolved UV–vis spectral changes for the reaction between MnIV(OH)(ttppc) and 2,4-DTBP. Inset: change in absorbance vs time for the growth of MnIII(ttppc) (660 nm) (green circles). (f) Plots of kobs versus [2,4-DTBP-OH] (black circles) and [2,4-DTBP-OD] (red squares). Reproduced from ref 33. Copyright 2018 American Chemical Society.