Crystal structure of triphenylphosphoniummethylenetrifluoroborate

Abstract

The title compound, C19H17BF3P {alternative name: triphenyl[(trifluoroboranyl)methyl]phosphanium}, was formed by the reaction of triphenylphosphine with potassium iodomethyltrifluoroborate. The molecule features a nearly staggered conformation along the P—C bond and a less than staggered conformation along the C—B bond. In the crystal, weak C—H...F hydrogen bonds between the meta-phenyl C—H groups and the trifluoroborate B—F groups form chains of R 2 2(16) rings along [100]. These chains are are further stabilized by weak C—H...π interactions. A weak intramolecular C—H...F hydrogen bond is also observed.