Z. Gross et S. Nimri, A PRONOUNCED AXIAL LIGAND EFFECT ON THE REACTIVITY OF OXOIRON(IV) PORPHYRIN CATION RADICALS, Inorganic chemistry, 33(9), 1994, pp. 1731-1732
The rate constants for the epoxidation of styrene by six oxoiron(IV) p
orphyrin cation radicals 1-X (X = -F, HOCH3, -Cl, -OAc, -OSO2CF3, -OCl
O3) which differ only in the identity of their axial ligan were obtain
ed under conditions where the presence of the axial ligands during the
reactions could be ascertained. A qualitative relationship was found
between the field strengths of the ligands and their pronounced effect
on the reactivity of 1-X.