X-Ray Valence-Band Emission Spectra from Square-Planar Complex Compounds of Palladium (II) and Platinum (II)

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With a high-resolution two crystal spectrometer, the palladium Lβ_2,15 emission and chlorine Kβ emission spectra in fluorescence are measured for square-planar complex compounds K₂PdCl₄, (NH₄)₂PdCl₄, trans-[Pd(NH₃)₂Cl₂], [Pd(NH₃)₄]Cl₂·H₂O, K₂PtCl₄, cis- and trans-[Pt(NH₃)₂Cl₂]. The result is presented along with the palladium L_III absorption-edge and chlorine K absorption-edge spectra of these compounds, reported previously. The effect of the ligand replacement (Remark: Graphics omitted.) is found in the both emission spectra. The effect of geometrical isomerism is observed in the chlorine Kβ emission spectra of cis- and trans-[Pt(NH₃)₂Cl₂]. The palladium Lβ_2,15 emission and chlorine Kβ emission spectra are interpreted in terms of the molecular orbitals of square-planar complexes.