Bis[(1RS,2RS)-4,4′-(1-aza­niumyl-2-hy­droxy­ethane-1,2-di­yl)dipyridinium] tris­[tetra­chloridopalladate(II)]

The asymmetric unit of the title compound, (C₁₂H₁₆N₃O)₂[PdCl₄]₃, consists of a 4,4′-(1-aza­niumyl-2-hy­droxy­ethane-1,2-di­yl)dipyridinium dication and one and a half tetra­chloridopalladate(II) anions; the latter has inversion symmetry. In the cation, the pyridinium rings attached to the central 1-aza­niumyl-2-hy­droxy­ethane fragment show an anti conformation, as indicated by the central C—C—C—C torsion angle of −178.1 (4)°, and they are inclined to one another by 25.7 (2)°. In the crystal, the cations and anions are linked through N—H...Cl and O—H...Cl hydrogen bonds. There are also π–π contacts [centroid–centroid distance = 3.788 (3) Å] and a number of C—H...O and C—H...Cl inter­actions are present, consolidating the formation of a three-dimensional structure.