Pre-steady state reactivity of 5,10,15,20-tetrakis(pentafluorophenyl)-21H, 23H-porphyrin iron(III) chloride with hydrogen peroxide

Abstract

A stopped-flow study has shown that tetrakis(pentafluoro-phenyl)porphyrin iron(iii) chloride reacts rapidly (<3 ms) with hydrogen peroxide to form a Fe III -H 2 O 2 complex where log K = 2.39. This subsequently undergoes rapid intramolecular conversion (k = 4.4 s -1) to an iron(iv) intermediate, which in turn reacts with hydrogen peroxide (k′ = 54.3 M -1 s -1) to reform the original Fe III -H 2 O 2 complex. © 2012 The Royal Society of Chemistry.