In the title compound, C17H19NO3S2, the maximum deviation of atoms in the 2H-chromene ring system is 0.0097 (14) Å and the piperidine ring adopts a chair conformation. The dihedral angle between the 2H-chromene ring and the piperidine ring (all atoms) is 87.59 (8)°. In the crystal, inversion dimers linked by pairs of C—H⋯O inter­actions generate R 2 2(22) loops. Further C—H⋯O hydrogen bonds link the dimers into [110] chains and weak aromatic π–π stacking [shortest centroid–centroid distance = 3.824 (8) Å] is also observed.

In the title compound, C31H38O3, the central benzene ring makes dihedral angles of 66.06 (9) and 65.21 (8)°, respectively, with the benzyl and 4-decyl­phenyl rings.

In the title compound, C23H19Cl2N5OS, the triazole ring makes dihedral angles of 24.81 (18), 69.94 (19) and 35.68 (18)° with the dichloro­phenyl, benzene and meth­oxy­phenyl rings, respectively. An intra­molecular N—H⋯N hydrogen bond occurs. In the crystal, inversion dimers linked by pairs of N—H⋯S hydrogen bonds occur. In addition, there are weak C—H⋯π inter­actions involving the dichloro­phenyl and triazole rings.

In the title compound, C17H10F6N4·H2O, the pyridine ring is not coplanar with the quinoline ring system; the dihedral angle between the two planes is 21.3 (1)°. One of the trifluoro­methyl group is disordered over two orientations with occupancies of 0.70 (1) and 0.30 (1). The water mol­ecule is disordered over two positions with occupancies of 0.76 (1) and 0.24 (1). In the crystal, the water mol­ecule is linked to the main mol­ecule via N—H⋯O and C—H⋯O hydrogen bonds, and inversion-related pairs are linked via O—H⋯N hydrogen bonds. In addition, a weak π–π inter­action is observed between the pyridine ring and the pyridine ring of the quinoline unit, with a centroid–centroid distance of 3.650 (2) Å.

In the title compound, C17H15NO2S2, the 3H-benzo[f]chromene ring system is distinctly twisted; the dihedral angle between the pyran ring and its opposite benzene ring is 9.11 (8)°. The N,N-dimethyl­carbamodithio­ate residue lies almost perpendicular to the pyran ring [dihedral angle = 85.15 (7)°]. In the crystal, weak C—H⋯O hydrogen bonds link the mol­ecules into C(10) chains propagating in [001].