Crystal structure of chlorido­penta­kis(dimethyl sulfoxide-κO)chromium(III) dichloride

In the complex cation of the title salt, [CrCl(C₂H₆OS)₅]Cl₂, the Cr^III ion is coordinated by one chloride ligand and five O atoms from dimethyl sulfoxide (DMSO) ligands, leading to a slightly distorted octa­hedral coordination environment [O—Cr—O angles range from 86.69 (16) to 92.87 (16)°]. In the crystal, complex cations are arranged in hexa­gonally packed rows parallel to [010], with the chloride counter-anions situated in between. The inter­actions between cations and anions are mainly ionic in nature.

Crystal structure of a monoclinic polymorph of 5-amino-1,3,4-thia­diazol-2(3H)-one

The title compound, C₂H₃N₃OS, is a monoclinic (P2₁/c) polymorph of the previously reported triclinic structure [Kang et al. (2012). Acta Cryst. E68, o1198]. The asymmetric unit contains two independent mol­ecules which are essentially planar, with r.m.s. deviations of 0.001 and 0.032 Å from the mean plane defined by the seven non-H atoms. In the crystal, N—H...N and N—H...O hydrogen bonds link the mol­ecules into a sheet parallel to (111).