2-(6-Hy­droxy-1-benzo­furan-3-yl)acetamide

In the title compound, C₁₀H₉NO₃, the dihedral angle between the benzo­furan ring system (r.m.s. deviation for the non-H atoms = 0.009 Å) and the –C—C(O)—N– segment is 83.76 (1)°. In the crystal, mol­ecules are linked by N—H...O and O—H...O hydrogen bonds, generating (001) sheets, which feature C(4) and C(10) chains.

N-(4-Methyl­phenyl­sulfon­yl)-3-nitro­benzamide

In the title compound, C₁₄H₁₂N₂O₅S, the dihedral angle between the aromatic rings is 86.29 (1)° and the conformation between the C=O bond of the amide group and the meta-NO₂ group is syn. The C—S—N—C torsion angle is −65.87 (19)° and the mol­ecule has an L-shaped conformation. In the crystal, the mol­ecules are connected into inversion dimers through pairs of N—H...O hydrogen bonds and C—H...O inter­actions forming R₂²(8) and R₂²(14) loops, respectively. The dimers are connected by further C—H...O inter­actions, thereby forming (100) sheets.

2-Chloro-N-(4-meth­oxy­benzo­yl)­benzene­sulfonamide

In the title compound, C₁₄H₁₂ClNO₄S, the dihedral angle between the aromatic rings is 82.07 (1)° and the dihedral angle between the planes defined by the S—N—C=O fragment and the sulfonyl benzene ring is 82.46 (3)°. In the crystal, the mol­ecules are linked into C(4) chains running along [001] by strong N—H...O hydrogen bonds. A C—H...O intera­ction reinforces the [001] chains: its graph-set symbol is C(7). The chains are cross-linked into (100) sheets by further C—H...O inter­actions as C(6) chains along [001]. The structure also features weak π–π stacking inter­actions [centroid–centroid distances = 3.577 (1) and 3.8016 (1) Å].