In the title compound, C15H17NO2S, the dihedral angle between the aromatic rings is 14.47 (8)°. The mol­ecule is bent at the N atom, with a C—SO2—NH—C torsion angle of 79.06 (13)°. In the crystal structure, the sulfonamide groups are hydrogen bonded via N—H⋯O links, forming chains of mol­ecules along the crystallographic b axis. π–π inter­actions [centroid–centroid distance = 3.81 (3) Å] also occur.

The title compound, C15H12F3NO2, adopts the phenol–imine tautomeric form, with the H atom attached to oxygen rather than to nitro­gen. There are two independent mol­ecules aligned nearly parallel in the asymmetric unit with their trifloramethyl groups pointing in opposite directions. The dihedral angles between the aromatic rings are 40.43 (1)° in the first mol­ecule and 36.12 (1)° in the second. Strong intra­molecular O—H⋯N hydrogen bonding generates S(6) ring motifs. Weak inter­molecular C—H⋯O hydrogen bonds link the independent mol­ecules separately into sheets normal to [010]. In addition, C—H⋯π inter­actions are also observed. The F atoms of the trifluoro­methyl groups are disordered over two sets of sites with refined site occupancies of 0.59 (2)/0.41 (2) and 0.62 (3)/0.38 (3), respectively.

The title compound, C11H13NO4, contains a nitrone group, C=N—O—R, the geometry of which shows a Z configuration with near planarity (r.m.s. deviation = 0.0787 Å) around the C=N double bond. An intra­molecular C—H⋯O hydrogen bond generates an S(6) ring motif. In the crystal packing, mol­ecules are linked into R 2 2(12) dimers and R 2 2(14) rings via C—H⋯O inter­molecular hydrogen bonds.

Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.003 Å; R factor = 0.059; wR factor = 0.169; data-to-parameter ratio = 71.3.In the title compound, C 16 H 17 NO 5 , the six-membered Ncontaining ring has a half-boat form; the spiro C atom deviates by 0.34 (2) Å from the plane (r.m.s. deviation = 0.051 Å ) defined by the N and four aromatic C atoms. Intramolecular N-HÁ Á ÁO hydrogen bonding generates an S(6) ring motif and the dihedral angle between the mean plane though the S(6) ring and that through the five-atom half-boat plane is 3.39 (2) . In the crystal, weak intermolecular C-HÁ Á ÁO hydrogen bonds link molecules into zigzag chains along [001] due to c-glide symmetry, and C-HÁ Á Á interactions extend along [010].

In the title compound, C31H39Br2N3O6S2, a 17-membered aza-macrocyclic ligand containing two ether O and three aza N atoms, the three pendant aromatic rings form an ‘E’ shape. The dihedral angles between the central benzene ring and the side ones are 17.8 (3) and 7.4 (3)°, and the dihedral angle between the tosyl rings is 10.6 (3)°. The methyl group is disordered over two orientations, with occupancies of 0.52 (15) and 0.48 (15).