ESCA and Mössbauer spectra of some iron(III) betadiketonates and tetraphenylporphyrin iron(III) chloride

Abstract

X-ray photoelectron spectra and Mössbauer spectra have been recorded for the complexes Fe(1-phenyl-1,3-butanedionate) 3, Fe(1,3-diphenyl-1,3-propanedionate) 3, Fe(3-phenyl-2,4-pentanedionate) 3 and meso-tetraphenylporphyrin iron(III) chloride. As an auxiliary tool in the study the IR absorption intensity of the ν CH vibrations of the phenyl groups present in the complexes was measured. By a combination of the XPS binding energies and the IR intensities with previously established relations between these entities and the effective charge of atoms and groups, a rather complete napping of the charge distribution of the complexes was achieved. By a combination of the XPS data with the Mössbauer data is was possible to describe the electron population in the (3rd, 4s, 4p) orbitals of the central iron atom.