Crystal structure of (2E)-N-methyl-2-(2-oxo-1,2-di­hydroacenaphthylen-1-ylidene)hydrazinecarbo­thioamide

In the title compound, the acenapthylene ring system and the hydrazinecarbo­thio­amide unit (=N—NH—C=S—NH–) are essentially coplanar, making a dihedral angle of 1.59 (9)°. The mol­ecular conformation is stabilized by two weak intra­molecular hydrogen bonds (N—H...O and N—H...N), which generate S(6) and S(5) ring motifs.

Crystal structure of (E)-2-[(4-chloro-2H-chromen-3-yl)methyl­idene]-N-cyclo­hexyl­hydrazinecarbo­thio­amide

In the title compound, C₁₇H₂₀ClN₃OS, the mean plane of the central thio­urea core makes dihedral angles of 26.56 (9) and 47.62 (12)° with the mean planes of the chromene moiety and the cyclo­hexyl ring, respectively. The cyclo­hexyl ring adopts a chair conformation. The N–H atoms of the thio­urea unit adopt an anti conformation. The chromene group is positioned trans, whereas the cyclo­hexyl ring lies in the cis position to the thione S atom, with respect to the thio­urea C—N bond. In the crystal, mol­ecules are linked by N—H...S hydrogen bonds, forming inversion dimers enclosing R²₂(8) ring motifs. The dimers are linked by C—H...Cl hydrogen bonds, enclosing R⁶₆(44) ring motifs, forming sheets lying parallel to (010).

Crystal structure of (2E)-N-methyl-2-[(4-oxo-4H-chromen-3-yl)methyl­idene]hydrazine­carbo­thio­amide

In the title compound, C₁₂H₁₁N₃O₂S, the dihedral angle between the 4H-chromen-4-one ring system and the –CH=N—NH—CS—NH– unit is 6.22 (1)°. In the crystal, inversion dimers linked by pairs of N—H...O hydrogen bonds generate R₂²(14) loops. The dimers are reinforced by a pair of C—H...O inter­actions, which generate R₂²(10) loops.