trans-Bis(2-amino-6-nitro-1,3-benzo-thiazole-N)dichloroplatinum(II)tetrakis(N,N '-dimethylformamide) solvate and tetrakis(2-amino-5-methyl-1,3,4-thiadiazole-N-4)platinum(II) hexachloroplatinate(IV) bis(N,N '-dimethylformamide) solvate

The structures of the title compounds, [PtCl2 (C7H5N3-O2S)(2)]. 4C(3)H(7)NO , (I), and [Pt(C3H5N3S)(4)][PtCl6]. 2C(3)H(7)NO, (II), respectively, compri se square-planar Pt II centres. In the cation and anion of (II), the Pt ato ms lie on independent inversion centres. For (I), the metal atom is N-bonde d to two trans organic ligands and also bonded to two Cl atoms, whereas in (II), the Pt atom is N-bonded to four organic ligands, the charge being bal anced by the presence of an additional [PtCl6](2-) species (from the starti ng material). Both structures contain dimethylformamide solvate molecules, four in the asymmetric unit of (I) and one in (II), which are involved in t he hydrogen-bonding network via N-H . . .X and C-H . . .X associations.