N,N,N,N′,N′,N′-Hexa­kis­(2-hy­droxy­ethyl)butane-1,4-diaminium bis­(2-sul­fan­ylidene-1,3-di­thiole-4,5-dithiolato-κ(2) S (4),S (5))zincate

In the asymmetric unit of the title compound, (C(16)H(38)N(2)O(6))[Zn(C(3)S(5))(2)], two independent cations lie across inversion centers. In one of the cations, the three symmetry-unique O—H groups are disordered over two sets of sites with refined occupancy ratios of 0.701 (9):0.299 (9), 0.671 (8):0.329 (8) and 0.566 (7):0.434 (7). In the anion, the Zn(II) ion is coordinated in a distorted tetra­hedral environment by four S atoms of two chelating 1,3-di­thiole-2-thione-4,5-dithiolato ligands. The dihedral angle between the mean planes [maximun deviations = 0.022 (3) and 0.0656 (6) Å] of the two ligands is 87.76 (3)°. An intamolecular O—H⋯O hydrogen bond occurs in the disordered cation. In the crystal, O—H⋯O and O—H⋯S hydrogen bonds link the components into a two-dimensional network parallel to (0-11).