Crystal structure of 6,6′-dimethyl-2H,2′H-3,4′-bichromene-2,2′-dione

In the title compound, the dihedral angle between the two coumarin units is 52.37 (19)°, showing a gauche arrangement across the C—C bond which links the two ring systems. In the crystal, C—H...O hydrogen bonds connect centrosymmetrically-related mol­ecules into dimers.

Crystal structure of 3-({[(morpholin-4-yl)carbono­thio­yl]sulfan­yl}acet­yl)phenyl benzoate

In the crystal structure of the title compound, the morpholine ring adopts the expected chair conformation. The central phenyl ring makes dihedral angles of 67.97 (4) and 7.74 (3)°, respectively, with the benzoate phenyl ring and the lattice mean plane. In the crystal, mol­ecules are linked by C—H...O hydrogen bonds.

Crystal structure of 3-[(E)-2-(4-phenyl-1,3-thia­zol-2-yl)hydrazin-1-yl­idene]indolin-2-one

In the title mol­ecule, C₁₇H₁₂N₄OS, the thia­zole ring forms a dihedral angle of 10.8 (2)° with the phenyl ring and an angle of 3.1 (3)° with the indole ring system [which has a maximum deviation of 0.035 (2) Å]. The dihedral angle between the planes of the phenyl ring and the indole ring system is 11.5 (1)°. An intra­molecular N—H...O hydrogen bond is observed. In the crystal, pairs of N—H...O hydrogen bonds form inversion dimers with an R²₂(8) graph-set motif.