X-Ray photoelectron spectra of compounds containing rhodium–halogen bonds and of rhodium(II) acetate and its derivatives: rhodium 3d and halogen np binding energies

Abstract

Rhodium 3d_3/2 and 3d_5/2 electron binding energies have been recorded for a series of complexes containing rhodium in the formal oxidation states + 3, + 2, and + 1. The 3d_5/2 binding energies were observed to vary over a range of 2·8 eV and for the rhodium(III) complexes these were fairly sensitive to the ligand environment, but little variation was found for adducts of Rh₂(OAc)₄. In general, there is a decrease in the 3d binding energies with decrease in oxidation state provided comparisons are made within related series of complexes. The chlorine 2p, bromine 3p, and iodine 3d binding energies have also been recorded for several of these complexes.