STUDY ON THE SUBSTITUENT EFFECTS OF THE O XIDATION OF MONOSPHORPHINATOIRON AND BISPORPHINATOIRON (III) WITH PHIO

The kinetic properties and substituent effects of the oxidations of 17 mono- and bisporphinatoiron(III) compounds with PhIO are studied by U V-Vis. The results show that the oxidations are second order for monop orphinatoiron(III), and first order for bisporphinatoiron (III). We ha ve found that there are the linear relationships between the reaction kinetic constant k and the substituent constant sigma for mono-and bis porphinatoiron(III), and the electronic effects of the substituents on the porphyrin rings on the oxidation of mono and bisporphinatoiron (I II) are different.