3,14-Diethyl-2,13-di­aza-6,17-diazonia­tri­cyclo­[16.4.0.0^7,12]docosane dichloride tetra­hydrate from synchrotron radiation

The asymmetric unit of title hydrated salt, C₂₂H₄₆N₄²⁺·2Cl⁻·4H₂O, comprises half a centrosymmetric dication, one Cl⁻ anion and two water mol­ecules of crystallization. The structure determination reveals that protonation has occurred at diagonally opposite amine N atoms, and that the dication features intra­molecular N—H...N hydrogen bonds. In the crystal, a three-dimensional artchitecture is formed by O—H...Cl/N and N—H...Cl/O hydrogen bonds.