Reactions of tetrabutylammonium halides with boron trifluoride and phosphorus pentafluoride

Abstract

Tetrabutylammonium halides react with one or more molecules of boron trifluoride or phosphorus pentafluoride at low temperature in dilute methylene chloride solution. Rapid, frequently concentration dependent equilibria occur in the nonideal solutions. The products isolated upon evaporation of solvent may not be those present in the dilute solutions. Usually a disproportionation occurs to yield BF4− or PF6−. With the exception of B2F7−, no complex ions involving fluorine bridging were found in solution or in the reaction products.