1-Methylpiperazine-1,4-diium tetrachloridozincate hemihydrate

The crystal structure of the title compound, (C5H14N2)[ZnCl4]·0.5H2O, is built up from discrete 1-methylpiperazinediium cations with chair conformation, tetrahedral tetrachloridozincate anions and uncoordinated solvent water molecules linked together by three types of intermolecular hydrogen bonds, viz. N—H⋯Cl, N—H⋯O and O—H⋯Cl.