Figure 35.

(a) Correlation of C–H HAT rate constants with O–H BDE for a variety of metal–oxo and metal–hydroxo oxidants at 298 K. The black dashed line passes through permanganate, t-butylperoxyl, and t-butoxyl radicals for reference. The red ■ is (PyPz)Fe^III–OH. Reported hydroxometal(III) complexes (green ▲), Fe(IV)=O complexes (blue ▲) and nitroxyl radicals HBTO and PINO (magenta ◆) are also shown for comparison. (b) A highly reactive hydroxo-iron(III) porphyrazine complex 65 for HAT. Adapted from ref (345). Copyright 2017 American Chemical Society.