Spectra of some d⁶ and d⁸ ions in fused LiCl–KCl at 450 ^°C

Abstract

The spectra of PdCl 2 , K 2 PtCl 4 , K 3 RhCl 6 , and K 3 IrCl 6 in fused LiCl–KCl eutectic at 450 °C are reported. The rhodium(III) and iridium(III) species are shown to exist as MCl 6 3− octahedral complexes with lower values of Δ and higher values of β than in aqueous solution. The palladium system is believed to contain the essentially octahedral PdCl 6 4− complex which has a small tetragonal distortion, whereas for the platinum(II) species a purely tetragonal classification is more appropriate.