N-Hydr­oxy-4,5-dimethyl­thia­zole-2(3H)-thione hemihydrate

The geometry of the title compound, C₅H₇NOS₂·0.5H₂O, is characterized by a planar N,S-heterocyclic core that is distorted from a regular penta­gon. Solvent water participates in non-chelated hydrogen bonds and acts as a twofold donor (O—H...S=C) and a twofold acceptor [O...H—O(—N)].

5-(4-Methoxy­phenyl)-4-methyl­thia­zole-2(3H)-thione

The mol­ecules of the title compound, C₁₁H₁₁NOS₂, form hydrogen-bonded dimers in the solid state. The amide H atom serves as hydrogen-bond donor and the thio­carbonyl S atom of a neighbouring mol­ecule serves as acceptor. The p-methoxy­phenyl substituent is tilted by 7.3 (5)° from the thia­zole-2(3H)-thione plane.

O-Ethyl S-(3-oxoindan-1-yl) dithio­carbonate

The title compound, C₁₂H₁₂O₂S₂, is a chiral O,S-dialkyl dithio­carbonate. The O-ethyl substituent and the dithio­carbonate functionality form a plane, which is twisted by 60.7 (2)° from the S-(3-oxoindan-1-yl) group.

O-Ethyl S-[1-(3,4-dimethoxy­phen­yl)-2-(hydroxyimino)­prop­yl] dithio­carbonate

The stereogenic centre in the title compound, C₁₄H₁₉NO₄S₂, is substituted with a dithio­carbonate, an ethyl­oximino and a 3,4-dimethoxy­phenyl group, as well as an H atom. Tandem hydrogen-bonding occurs between enantiomers to produce dimers, in which the oxime H atom serves as donor toward the oxime N atom of an adjacent mol­ecule.

1,2-Bis[4-(4-chloro­phen­yl)-1,3-thia­zol-2-yl]disulfane

In the title compound, C₁₈H₁₀Cl₂N₂S₄, a 1,2-substituted disulfane, the torsion angle between the p-chloro­phenyl and the 1,3-thia­zole rings is -2.0 (6)° for the group attached to the the first disulfane S atom, and 14.6 (7)° for the substitutent located at the second.

A second polymorph of 1,2-bis­[4-(4-chloro­phen­yl)-1,3-thia­zol-2-yl]disulfane

The asymmetric unit of the title compound, C₁₈H₁₀Cl₂N₂S₄, consists of one full mol­ecule and two half mol­ecules, which are completed by twofold rotation symmetry.