VII. On phosphorus pentafluoride

Abstract

Arsenic trifluoride acts violently upon phosphorus pentachloride with the formation of arsenic trichloride and the liberation of a heavy fuming gas, which analysis shows to be phosphorus pentafluoride . The production of the new gas may be represented by the equation 5 AsF 3 + 3 PCl 5 = 5 AsCl 3 + 3PF 5 . Direct experiments have shown that the amount of arsenic trichloride actually produced in the reactions agrees closely with that demanded by this equation.