Osmium pentafluoride
Osmium pentafluoride is an inorganic compound with the formula OsF5. It is a blue-green solid. Like the pentafluorides of Ru, Rh, and Ir, OsF5 exists as a tetramer in the solid state.
Preparation
Osmium pentafluoride can be prepared by reduction of osmium hexafluoride with iodine as a solution in iodine pentafluoride:It can also be prepared by treating a solution of osmium hexafluoride in anhydrous hydrogen fluoride with hydrogen or silicon. Platinum gauze or UV irradiation increase the reaction rate.