Crystal structure of (E)-2-[(2S,5R)-2-isopropyl-5-methyl-cyclo-hexyl-idene]hydrazine-1-carbo-thio-amide.

The title compound, C11H21N3S, consists of a menthone moiety attached to an extended thio-semicarbazone group with the N-N-C-N torsion angle being 11.92 (16)°. The cyclo-hexane ring has a chair conformation and the conformation about the C=N bond is E. In the crystal, mol-ecules are linked via pairs of N-H⋯S hydrogen bonds, forming chains along the a axis. The absolute structure could be assigned with reference to the starting material, i.e. enanti-opure (-)-menthone [Flack parameter = 0.05 (5)].

N-Methyl-2-(1-methyl-3-phenyl-prop-2-en-1-yl-idene)hydrazinecarbo-thio-amide.

In the title compound, C12H15N3S, the mol-ecule deviates slightly from planarity, with a maximum deviation from the mean plane of the non-H atoms of 0.2756 (6) Šfor the S atom and a torsion angle for the N-N-C-N fragment of -7.04 (16)°. In the crystal, mol-ecules are linked by N-H⋯S hydrogen-bond inter-actions, forming centrosymmetric dimers. Additionally, one weak intra-molecular N-H⋯N hydrogen-bond inter-action is observed. The crystal packing shows a herringbone arrangement viewed along the c axis.