Relationship between the metal ionization energies and the chlorine K—x-ray absorption of some transition metal chlorides

Abstract

The K absorption spectra of chlorine in CrCl₂, CuCl₂, and ZnCl₂ have been obtained with a 50‐cm bent‐quartz‐crystal vacuum spectrograph. Results are evaluated by comparing the obtained spectra with the chlorine K absorption spectra of MnCl₂, FeCl₂, CoCl₂, and NiCl₂ reported previously. Chemical shifts are also found for the first absorption maximum and discussed in relation to the ionization energies of the monovalent metal ions. The chemical shifts are accounted for in terms of the change of the ionization energies.