An optically resolved crystal of thio­malate: (S)-1-phenyl­ethanaminium (R)-thio­malate

The asymmetric unit of the optically resolved title salt, C₈H₁₂N⁺·C₄H₅O₄S^-, contains a 1-phenyl­ethanaminium monocation and a thio­malate (3-carb­oxy-2-sulfanyl­propano­ate) monoanion. The absolute configurations of the cation and the anion are determined to be S and R, respectively. In the crystal, cation-anion N-H...O hydrogen bonds, together with anion-anion O-H...O and S-H...O hydrogen bonds, construct a two-dimensional supra­molecular sheet parallel to the ab plane. The two-dimensional sheet is linked with the upper and lower sheets through C-H...[pi] inter­actions to stack along the c axis.

The first crystal structure of an alkaline metal salt of thio­glucose: potassium 1-thio-β-D-glucoside monohydrate

In the crystal structure of the title hydrated salt, poly[(μ₂-aqua)(μ₄-1-sulfido-β-D-glucoside)potassium], [K(C₆H₁₁O₅S)(H₂O)]_n or K⁺·C₆H₁₁O₅S⁻·H₂O, each thio­glucoside anion coordinates to four K⁺ cations through three of its four hy­droxy groups, forming a three-dimensional polymeric structure. The negatively charged thiol­ate group in each anion does not form an efficient coordination bond with a K⁺ cation, but forms inter­molecular hydrogen bonds with four hy­droxy groups, which appears to sustain the polymeric structure. The Cremer–Pople parameters for the thio­glucoside ligand (Q = 0.575, θ = 8.233° and φ = 353.773°) indicate a slight distortion of the pyran­ose ring.