Abstract

The He I and He I photoelectron spectra of Zn, Cd, and Hg halides (except fluorides) are presented. The inner metal d-like orbitals exhibit a larger chemical shift for Zn and Cd halides than for Hg halides. Analysis leads to a larger electronegativity for Hg than for Zn and Cd, contrary to a recently reported result, but in agreement with the thermochemical Pauling scale. The partial cross sections manifest dramatic photon energy dependence; the ionization cross section of the p-like orbitals decreases drastically, that of the d-like orbitals increases very significantly while the s-like orbitals slightly decrease between 21.2 and 40.8 eV.

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