Butyl­triphenyl­phospho­nium bromide

At 106 K, the three C atoms closest to P in the but­yl group of the title compound, C₂₂H₂₄BrP, are in an extended conformation. However, unlike the longer alkyl­amine substituted triphenyl­phospho­nium compounds, the terminal torsion angle in the but­yl group is gauche. The phen­yl rings are in the propeller configuration usually found in this family of triphenyl­phospho­nium compounds.