XPS studies of some metal thionitrosyl complexes: Correlation of the binding energies with simple M. O. theory

The X-ray photoelectron spectra of some transition metal thionitrosyl complexes have been measured. The binding energies of the metal core electrons confirm the expected formal oxidation state of +2 for the metal. The N(1s) and S(2p) binding energies are shown to correlate well with the calculated charge on the atom in question corrected by the effect of the Coulombic potential of the whole molecule upon the ionising electron.