Crystal structures of methyl 3-phenyl-4,5-di­hydro-1H,3H-benzo[4,5]imidazo[2,1-c][1,4]oxazepine-4-carboxyl­ate and methyl 1-methyl-3-phenyl-4,5-di­hydro-1H,3H-benzo[4,5]imidazo[2,1-c][1,4]oxazepine-4-carboxyl­ate

In two benzo[4,5]imidazo[2,1-c][1,4]oxazepine-4-carboxyl­ates, the seven-membered oxazepane rings both have a twist-chair conformation. The dihedral angle between the phenyl ring and the benzimidazole ring system is significantly smaller in one of the compounds, viz. 73.42 (10) compared to 83.07 (17)°.

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 trans-aqua­(perchlorato-κO)bis­(propane-1,3-di­amine-κ²N,N′)copper(II) perchlorate

In the title compound, the Cu^II atom has a distorted octa­hedral coordination sphere coordinated by the N atoms of two propane-1,3-di­amine ligands in the equatorial plane. The axial positions are occupied by a water O atom and an O atom of a disordered perchlorate anion [occupancy ratio 0.631 (9):369 (9)].

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.