Bis(6-meth­oxy-1-methyl-2,3,4,9-tetra­hydro-1H-β-carbolin-2-ium) tetra­chloridozincate(II) dihydrate

The asymmetric unit of the title compound, (C(13)H(17)N(2)O)(2)[ZnCl(4)]·2H(2)O, contains two tetra­hydro­harmine cations, one tetra­chloro­zincate(II) anion and two water mol­ecules. In the cations, the two 1H-indole ring systems are essentially planar, with maximum deviations of 0.016 (2) and 0.018 (2) Å, and both tetra­hydro­pyridinium rings show a half-chair conformation. The Zn(II) complex anion has a distorted tetra­hedral geometry. In the crystal, inter­molecular N—H⋯O, N—H⋯Cl, O—H⋯O, O—H⋯Cl and C—H⋯O hydrogen bonds link the components into a three-dimensional network. A π–π inter­action with a centroid–centroid distance of 3.542 (14) Å is also observed.