Retention of configuration at the titanium atom upon oxo–peroxo ligand substitution of titanium(IV) porphyrins

Abstract

N.m.r. spectra of oxo- and peroxo-titanium(IV) complexes of a suitably substituted tetraphenylporphyrin suggest that formation of the peroxo-species from the oxo-compound and hydrogen peroxide takes place with retention of configuration; labelling experiments indicate that this ligand exchange is a true substitution, i.e. the O–O bond of H₂O₂ remains intact in the peroxo complex.