Benzyltripropylammonium bromide: a structure in polar space group P4₂bc

Crystals of the title compound, C₁₆H₂₈N⁺·Br⁻, were grown from solution in a mixture of acetone and propan-2-ol by slow evaporation. The structure was solved in the polar space group P4₂bc with five moieties in the asymmetric unit, namely two benzyl­tri­propyl­ammonium cations in general positions, and two Br⁻ anions in special Wyckoff positions (4a2.. and 4b2..) and one in a general position. The structure consists of two kinds of molecular columns parallel to c, built of cations connected through C—H⋯π hydrogen bonds and stabilized by weak C—H⋯Br interactions.