Self-assembly of long-chain quaternary ammonium cations in a hybrid inorganic–organic material with one-dimensional polymeric tribromido­plumbate(II)

catena-Poly[benzyl­decyl­dimethyl­ammonium [plumbate(II)-tri-μ-bromido]], {(C₁₉H₃₄N)[PbBr₃]}_n, crystallizes as an inorganic–organic hybrid following monoclinic space-group symmetry P2₁/c. The structure consists of extended chains running along the [001] direction and built of [PbBr₃]⁻ units. These inorganic chains are separated by inter­digitated ammonium cations which form hydro­philic layers through weak C—H...Br inter­actions. The architecture is essentialy the same as found for n-alkyl­benzyl­dimethyl­ammonium bromides.