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) ] and a number of C—H...O and C—H...Cl interactions are present, consolidating the formation of a three-dimensional structure.