2,5-Bis[2-({bis-[3-(dimethyl-aza-nium-yl)prop-yl]aza-nium-yl}meth-yl)phen-yl]-1,3,4-oxadiazole hexa-kis-(perchlorate) sesquihydrate.

In the title hydrated salt, C36H66N8O(6+)·6ClO4(-)·1.5H2O, the asymmetric unit consists of a hexa-protonated [H6L](6+) cation, five perchlorate anions in general positions, two on twofold rotation axes (one of which is disordered), and two water mol-ecules of crystallization in general positions, one of them disordered around a twofold crystallographic axis. In the [H6L](6+) cation, two strong intra-molecular N-H⋯N hydrogen bonds occur, involving the N atoms of the oxadiazole ring as acceptors and the closest NH(+) groups of each dipropyl-enetriamine unit. In the crystal, the [H6L](6+) cations form channels along the a-axis direction, in which the perchlorate counter-ions and the water mol-ecules are lodged. The crystal packing features a network of N-H⋯O and O-H⋯O hydrogen bonds involving the NH(+) groups of the [H6L](6+) cation, the perchlorate anions and the water mol-ecules.