A matrix isolation and computational study of molecular palladium fluorides: does PdF₆ exist?
Antony Wilson, Tim Nguyen, Felix Brosi, Xuefeng Wang, Lester Andrews, Sebastian Riedel, Adam Bridgeman, Nigel Young – 2016
Palladium atoms generated by thermal evaporation and laser ablation were reacted with and trapped in F₂/Ar, F₂/Ne, and neat F₂ matrices. The products were characterized by electronic absorption and infrared spectroscopy, together with relativistic density functional theory calculations as well as coupled cluster calculations. Vibrational modes at 540 and 617 cm⁻¹ in argon matrices were assigned to molecular PdF and PdF₂, and a band at 692 cm⁻¹ was assigned to molecular PdF₄. A band at 624 cm⁻¹ can be assigned to either PdF₃ or PdF₆, with the former preferred from experimental considerations. Although calculations might support the latter assignment, our conclusion is that in these detailed experiments there is no convincing evidence for PdF₆.