Preparation and characterization of tetrafluorophosphonium(V) hexadecafluorotriantimonate(V), [PF4][Sb3F16], the adduct arsenic pentafluoride–trifluorophosphine (1/1), and the redox reactions of trifluorophosphine with arsenic, antimony, and bismuth pentafluoride

Abstract

Phosphorus pentafluoride and SbF₅ form a 1 : 3 adduct the vibrational spectrum of which is consistent with the formulation [PF₄][Sb₃F₁₆]. The 1 : 1 donor–acceptor adduct formed at –130 °C between PF₃ and AsF₆ has been characterized by Raman spectroscopy. The adduct is in equilibrium with its dissociated components between –130 and –78 °C; however, a redox reaction occurs at –78 °C. Phosphorus trifluoride also undergoes redox reactions with antimony and bismuth pentafluorides.