In the title compound, C28H22O6, the chromeno ring system is almost planar, with a dihedral angle between the mean planes of the pyran and benzene rings of 1.87 (8)°. The pyran ring bearing the methyl­phenyl substituent has a half-chair conformation while the other pyran ring has an envelope conformation with the tetra­substituted C atom as the flap. The benzene ring of the chromeno ring system is inclined to the benzene ring fused to the latter pyran ring by 74.66 (9)°. These aromatic rings are inclined to the 4-methyl­phenyl ring by 52.67 (9) and 66.63 (10)°, respectively. In the crystal, mol­ecules are linked via C—H⋯O hydrogen bonds, forming a two-dimensional network parallel to the bc plane.

In the title compound, C26H27ClN3O3P, the mean plane of the central pyrazole ring forms a dihedral angle of 71.37 (14)° with the chloro­phenyl ring. In the crystal, mol­ecules are linked by pairs of N—H⋯O hydrogen bonds, forming inversion dimers with R 2 2(10) ring motifs. The 3-phenyl ring is disordered with four C atoms occupying two sets of sites with an occupancy ratio of 0.748 (4):0.252 (4).

In the crystal structure of the title salt, C11H16NO2 +·Cl−, the cations and anions are linked by O—H⋯Cl hydrogen bonds. The structure is further stabilized by weak C—H⋯Cl hydrogen bonds.

In the crystal structure of the title compound, C16H13NOS, mol­ecules are linked into cyclic centrosymmetric R 2 2(8) dimers via pairs of N—H⋯O hydrogen bonds. The seven-membered ring adopts a boat conformation.

The C=C double bonds in the title compound, C28H27NO4, adopt an E conformation. In the crystal, pairs of C—H⋯O hydrogen bonds link the mol­ecules into inversion dimers.

In the crystal structure of the title compound, C16H12ClNOS, the mol­ecules are linked into centrosymmetric R 2 2(8) dimers via pairs of N—H⋯O hydrogen bonds. The seven-membered ring adopts a boat conformation.

Mol­ecules of the title compound, C21H24O4, are located on a twofold rotation axis running through the central methyl­ene C atom. The aldehyde group is coplanar with the benzene ring [C—C—C—O = 175.7 (4) °].

In the title compound, C26H27BrN3O3P, the central pyrazole ring forms a dihedral angle of 71.7 (2)° with the bromo­phenyl ring. In the crystal, mol­ecules are linked by pairs of N—H⋯O hydrogen bonds, forming inversion dimers with R 2 2(10) ring motifs. Four C atoms of the 3-phenyl ring are disordered over two sets of sites [site occupancies = 0.745 (6) and 0.225 (6)].

In the title compound, C13H14O4S, both C=C double bonds adopt an E conformation. In the crystal, mol­ecules are linked into centrosymmetric R 2 2(14) dimers via pairs of C—H⋯O hydrogen bonds.

In the title compound, C18H17NO4, the hy­droxy­ethanimine group is essentially coplanar with the ring to which it is attached [C—C—N—O torsion angle = 179.94 (14)°]. The mol­ecules are linked into cyclic centrosymmetric R 2 2(6) dimers via O—H⋯N hydrogen bonds and the crystal packing is further stabilized by C—H⋯O inter­actions.

In the title compound, C18H16N2O2, the hy­droxy­ethanimine group is essentially coplanar with the ring to which it is attached (C—C—N—O torsion angle = −176.9°). Mol­ecules are linked into cyclic centrosymmetric R 2 2(6) dimers via O—H⋯N hydrogen bonds.

In the title compound, C16H13NOS, the seven-membered ring adopts a distorted half-chair conformation. In the crystal, mol­ecules are linked by N—H⋯O hydrogen bonds, forming chains running along the b axis. The crystal packing is further stabilized by C—H⋯O inter­actions.