Spectroscopic characterization of a phenolate bound Fe(II)-O2 adduct: gauging the relative "push" effect of a phenolate axial ligand.

ABSTRACT

Dioxygen adducts of solvent, imidazole and phenolate bound iron porphyrin complexes are reported. The data show that the Fe-O vibration of the Fe-O2 species shifts from 584 cm(-1) to 570 cm(-1) as neutral axial ligands are replaced by the anionic phenolate ligand.