Tetra-aqua-bis-(thio-urea-κS)cadmium(II) triaqua-tris(thio-urea-κS)cadmium(II) disulfate.

The title compound, [Cd(CH(4)N(2)S)(2)(H(2)O)(4)][Cd(CH(4)N(2)S)(3)(H(2)O)(3)](SO(4))(2), contains two mol-ecules of each of the Cd complexes and four sulfate ions in the asymmetric unit: all the Cd atoms exhibit distorted octa-hedral geometries. The Cd-S and Cd-O bond lengths around the Cd atoms in the bis-(thio-urea) cations are in the ranges 2.580 (4)-2.599 (4) and 2.323 (8)-2.421 (9) Å, respectively, and the S atoms are in a cis orientation. In the tris-(thio-urea) cations, the corresponding bond lengths around the Cd atoms are slightly longer and are in the ranges 2.559 (4)-2.706 (3) and 2.303 (7)-2.480 (10) Å, respectively, and the S atoms are in a fac disposition. The crystal structure features numerous N-H⋯O, N-H⋯N, O-H⋯O and O-H⋯N hydrogen bonds. Two O atoms of a sulfate anion were found to be disordered over two orientations in a 0.620 (9):0.380 (9) ratio. The crystal studied was a racemic twin with BASF = 0.17 (5).