1,4-Dimethylpiperazine-1,4-diium bis(hexafluorophosphate) dihydrate

Abstract

In the title hydrated mol­ecular salt, C6H16N2 +·2PF6 −·2H2O, the complete 1,4-dimethyl­piperazine-1,4-diium dication is generated by crystallographic inversion symmetry and both C—N bonds are in equatorial orientations. In the crystal, the components are linked by O—H⋯F and N—H⋯O hydrogen bonds but there are no direct links between cations and anions.