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In the title compound, C24H16Cl2N2O3, the three benzene rings are twisted with respect to the central pyrazole ring, making dihedral angles of 71.56 (9) (4-chlorobenzoyloxy), 57.55 (8) (4-chlorobenzoyl) and 39.33 (1)° (phenyl).

The complete molecule of the title compound, C42H36N6O2, is generated by a crystallographic twofold axis with two C atoms of the central phenyl group lying on the axis. In the independent part of the molecule, one amino group is involved in an intramolecular N—H...O hydrogen bond, and the two adjacent phenyl rings are twisted from the plane of the pyrazolone ring with dihedral angles of 6.82 (3) and 88.32 (6)°. The crystal packing exhibits no classical intermolecular contacts.

In the title molecule, C8H11NO2, the r.m.s. deviation of non-H atoms from their best plane is 0.031 Å. Molecules are connected via a pair of N—H...O hydrogen bonds into a centrosymmetric dimer.

The title compound, C10H11N3O2, was synthesized by the reaction of 1H-benzotriazole with ethyl 2-chloroacetate in ethanol. The non-H atoms, excluding the benzotriazol-1-yl group, are almost coplanar (r.m.s. deviation of the non-H atoms = 0.0409 Å). The dihedral angle formed between this plane and the benzotriazole ring is 79.12 (5)° In the crystal, weak intermolecular C—H...N and C—H...O interactions help to consolidate the three-dimensional network.

In the title compound, C9H10ClNO, the non-H atoms, excluding the phenyl group, are almost coplanar (r.m.s. deviation of the non-H atoms = 0.1015 Å). The dihedral angle formed between this plane and the benzene ring is 87.07 (5)°. Weak intermolecular C—H...O interactions help to stabilize the packing.

The non-H atoms of the title compound, C9H13NO2, are almost coplanar (r.m.s. deviation = 0.0358 Å). Weak intermolecular N—H...O hydrogen bonds link the molecules into zigzag chains along the b axis with graph-set motif C(5). The chains are further linked into a three-dimensional network by C—H...O hydrogen bonds and C—H...π interactions.

In the title compound, C17H13ClN2O2·H2O, the dihedral angle between the quinoline ring system and the benzene ring is 13.0 (1)°. An intramolecular N—H...O hydrogen bond may influence the molecular conformation. In the crystal structure, acetamide molecules are linked to water molecules via intermolecular O—H... N and N—H...O hydrogen bonds and in turn linked into chains along [010] via O—H...O hydrogen bonds.

In the title compound, C16H18N2O2, the molecule adopts an E conformation about the C=N double bond. The dihedral angle between the pyrrole and phenyl rings is 41.55 (8)°. In the crystal structure, pairs of intermolecular N—H...O hydrogen bonds link the molecules into centrosymmetric dimers. In the dimer, the two pyrrole rings are almost coplanar and the two phenyl rings are parallel to each other.