Piperazin-1-ium triaquadibromidosodium

In the title compound, (C₄H₁₁N₂)[NaBr₂(H₂O)₃], the complete organic cation, which adopts a typical chair conformation, is generated by crystallographic inversion symmetry and one of the N-bonded H atoms is half occupied. The sodium ion (site symmetry <i>m</i>) at the centre of the complex anion adopts a distorted trigonal-bipyramidal coordination geometry with the water mol-ecules in the equatorial sites and the bromide ions in the axial sites. In the extended structure, O-H⋯Br hydrogen bonds generate a porous 'honeycomb' three-dimensional network of complex anions encapsulating [010] channels occupied by the cations, which are linked to each other by N-H⋯N hydrogen bonds and anchored to the honeycomb network <i>via</i> N-H⋯Br hydrogen bonds.