3-(2,4,6-Trimethyl­benzo­yl)-2-naphthoic acid

The asymmetric unit of the title compound, C21H18O3, contains two crystallographically independent mol­ecules. The two mol­ecules are linked into cyclic centrosymmetric dimers R 2 2(8) by O—H⋯O hydrogen bonds. The dihedral angles between the naphthalene ring system and the benzene ring are 87.0 (8) and 84.4 (2)° in the two mol­ecules. The crystal packing is stabilized by O—H⋯O, C—H⋯π and π–π inter­actions [centroid–centroid distance = 3.664 (11) Å]. In one mol­ecule, the mesityl ring is disordered over two positions [occupancy ratio 0.690 (3):0.690 (3)]

2,3,4,9-Tetra­hydro-1H-carbazole

In the title compound, C12H13N, two methyl­ene C atoms of the cyclo­hexene ring are disordered over two sites with occupancies of 0.591 (10) and 0.409 (10); both disorder components adopt half-chair conformations. The crystal structure is stabilized by inter­molecular N—H⋯π and C—H⋯π inter­actions

N-(2-Formyl­phen­yl)benzene­sulfonamide

In the title compound, C13H11NO3S, the two aromatic rings are oriented at an angle of 88.18 (8)°. Intra­molecular N—H⋯O and C—H⋯O hydrogen bonds are observed, each of which generates an S(6) ring motif. In the crystal, mol­ecules are linked into C(7) chains along [010] by inter­molecular C—H⋯O hydrogen bonds. The structure is further stabilized by inter­molecular C—H⋯π inter­actions involving the sulfonyl-bound phenyl ring

Diethyl 2-(2-nitro­benzyl­idene)malonate

In the title compound, C14H15NO6, the ethoxy­carbonyl groups adopt extended conformations. In the crystal, mol­ecules are linked into centrosymmetric dimers via pairs of C—H⋯O hydrogen bonds with a R 2 2(20) motif

Naphthalene-2,3-diylbis[(2-thien­yl)methanone]

The asymmetric unit of the title compound, C20H12O2S2, contains two crystallographically independent mol­ecules which differ in the orientations of thienylmethanone units with respect to the naphthalene ring system [dihedral angles of 65.30 (11) and 50.94 (11)° in one molecule, 41.94 (12) and 69.61 (13)° in the other]. The crystal structure is stabilized by C—H⋯O and C—H⋯π inter­actions

Ethyl 2-acetoxy­methyl-1-phenyl­sulfonyl-1H-indole-3-carboxyl­ate

In the title compound, C20H19NO6S, the phenyl ring of the phenyl­sulfonyl group makes a dihedral angle of 83.35 (5)° with the indole ring system. The mol­ecular structure exhibits a number of short intramolecular C—H⋯O contacts

(4-Bromo­phen­yl)(1-phenyl­sulfonyl-1H-indol-2-yl)methanone

In the title compound, C21H14BrNO3S, the indole ring system forms dihedral angles of 65.64 (8) and 59.30 (8)°, respectively, with the phenyl and bromo­phenyl rings. In the crystal, mol­ecules are connected by a C—H⋯O hydrogen bond, forming a chain along [101]. The chains are further connected by weak inter­molecular C—H⋯π inter­actions, forming a layer parallel to the ac plane

5-Methyl­phenanthro[2,3-b]thio­phene

The title compound, C17H12S, which crystallises with two molecules in the asymmetric unit, features four fused rings forming an essentially planar mol­ecule, with maximum deviations from the mean plane of 0.078 (2) and 0.080 (2) Å for C atoms of the thio­phene and phenanthrene groups in both the mol­ecules. The crystal packing features weak C—H⋯π inter­actions

2-Chloro­methyl-3-methyl-1-phenyl­sulfonyl-1H-indole

In the title compound, C16H14ClNO2S, the phenyl ring makes a dihedral angle of 78.1 (1)° with the indole ring system. The mol­ecular structure is stabilized by weak intra­molecular C—H⋯O inter­actions. The crystal structure exhibits weak inter­molecular C—H⋯O, C—H⋯π and π–π [centroid–centroid distances = 3.620 (1)–3.794 (1) Å] inter­actions

Diethyl 3,4-bis(acetoxy­meth­yl)thieno[2,3-b]thio­phene-2,5-dicarboxyl­ate

In the title compound, C18H20O8S2, the dihedral angle between the two thio­phene rings is 2.33 (7)°. The methyl C atoms of the ester groups are disordered over two positions; the site-occupancy factors of the terminal methyl C atoms are 0.632 (18):0.368 (18) and 0.623 (17):0.377 (17). The mol­ecular structure is stabilized by weak intra­molecular C—H⋯O inter­actions and the crystal structure is stabilized through weak inter­molecular C—H⋯O inter­actions