(E)-1-[2-(2-Nitro-styr-yl)-1-phenyl-sulfonyl-1H-indol-3-yl]propan-1-one.

In the title compound, C25H20N2O5S, the phenyl ring makes dihedral angles of 89.88 (8) and 13.98 (8)°, respectively, with the indole ring system and the nitro-benzene ring. The dihedral angle between the indole ring system and the nitro-benzene ring is 88.48 (11)°. The mol-ecular structure is stabilized by a weak intra-molecular C-H⋯O inter-action. In the crystal, π-π inter-actions, with centroid-centroid distances of 3.6741 (18) and 3.8873 (17) Å, link the mol-ecules into layers parallel to the ab plane.

(E)-2-Bromo-1-[2-(2-nitro-styr-yl)-1-phenyl-sulfonyl-1H-indol-3-yl]ethanone.

In the title compound C24H17BrN2O5S, the phenyl ring makes dihedral angles of 85.4 (2) and 8.8 (2)° with the indole ring system and the nitro-benzene ring, respectively, while the indole ring system and nitrobenzene ring make a dihedral angle of 80.1 (2)°. In the crystal, weak C-H⋯O inter-actions link the mol-ecules, forming a two-dimensional network parallel to the bc plane.

(Naphthalen-1-yl){2-[(5,6,7,8-tetrahydronaphthalen-2-yl)carbonyl]phenyl}methanone.

The title compound C28H22O2, basically consists of three ring systems, viz. a central benzene ring, with a lateral napthalene group to which it subtends a dihedral angle of 66.56 (4)° and a tetra-hydro-pyran ring exhibiting a half-chair conformation. The mol-ecular structure is stabilized by a weak intra-molecular C-H⋯O inter-action, while the crystal packing features weak C-H⋯π contacts.

(E)-2-[(2-Formyl-phen-oxy)meth-yl]-3-(4-iso-propyl-phen-yl)acrylo-nitrile.

In the title compound, C20H19NO2, the dihedral angle between the benzene rings is 77.12 (8)°. The terminal isopropyl group is disordered over two orientations, with site occupancies of 0.720 (14) and 0.280 (14). In the crystal, mol-ecules are linked through a weak C-H⋯O inter-action, forming a zigzag chain along the c-axis direction.

8-Bromo-3-(4-ethyl-phen-yl)-1-phenyl-3,3a,4,9b-tetra-hydro-1H-chromeno[4,3-c]isoxazole-3a-carbo-nitrile.

In the title compound, C25H21BrN2O2, the fused isoxazolidine ring adopts an envelope conformation with the N atom at the flap and the mean plane of the ring makes dihedral angles of 54.37 (12) and 87.32 (13)°, respectively, with the adjacent phenyl and benzene rings. The tetra-hydro-pyran ring has a half-chair conformation. In the crystal, mol-ecules are linked into a double-column structure along the b-axis direction through weak C-H⋯O and C-H⋯π inter-actions.

Methyl 11,14,16-triphenyl-8,12-dioxa-14,15-di-aza-tetra-cyclo-[8.7.0.0(2,7).0(13,17)]hepta-deca-2(7),3,5,13(17),15-penta-ene-10-carboxyl-ate.

In the title compound, C33H26N2O4, the pyrazole ring makes dihedral angles of 15.13 (7) and 60.80 (7)° with the adjacent phenyl rings. Both di-hydro-pyran rings exhibit half-chair conformations. A weak intra-molecular C-H⋯O inter-action occurs. In the crystal, mol-ecules are linked into inversion dimers through pairs of C-H⋯N inter-actions. Weak C-H⋯π inter-actions are also observed.

(E)-2-Bromo-methyl-3-(o-tol-yl)acrylo-nitrile.

The title compound C11H10BrN, has an E conformation at the C=C bond of the acrylo-nitrile unit. The vinyl group makes a dihedral angle of 44.53 (12)° with the benzene ring. In the crystal, weak C-H⋯π inter-actions involving the benzene ring are observed.

3,4-Dibromo-2,5-dimethyl-1-phenyl-sulfonyl-1H-pyrrole.

In the title compound, C(12)H(11)Br(2)NO(2)S, the dihedral angle between the two rings is 78.79 (12)°. The crystal packing features C-H⋯π inter-actions.

2-(4-Methyl-phen-yl)-1-phenyl-sulfonyl-3-nitro-1,2-dihydro-quinoline.

In the title compound, C(22)H(18)N(2)O(4)S, the dihedral angle between the phenyl-sulfonyl ring and the methyl-phenyl ring is 67.78 (7)°. In the crystal, mol-ecules are linked by weak inter-molecular C-H⋯O inter-actions into a zigzag chain along the [101] direction.

Methyl 3-(4-isopropyl-phen-yl)-1-phenyl-3,3a,4,9b-tetra-hydro-1H-chromeno[4,3-c]isoxazole-3a-carboxyl-ate.

In the title compound, C(27)H(27)NO(4), the five-membered isoxazole ring adopts an envelope conformation and the six-membered pyran ring adopts a half-chair conformation. The dihedral angle between the mean planes of the isoxazole ring and the chromene ring system is 54.95 (4)°.

Methyl 6-(4-chloro-phen-yl)-2,4-dimethyl-1,3-dioxo-1,2,3,4,6,6a,7,12b-octa-hydro-chromeno[4',3':4,5]pyrano[2,3-d]pyrimidine-6a-carboxyl-ate.

In the title compound, C(24)H(21)ClN(2)O(6), the two fused six-membered pyran rings adopt half-chair conformations. The dihedral angle between the pyrimidine ring and the chloro-phenyl ring is 51.55 (3)°. In the crystal, mol-ecules are linked by pairs of weak inter-molecular C-H⋯O hydrogen bonds, forming inversion dimers. A C-H⋯π inter-action is also observed.

(Acetoxy)(2-methylphenyl)methyl acetate.

In the title compound, C(12)H(14)O(4), the two acet-oxy groups are inclined by 57.92 (5)° and 62.71 (6)° to the benzene ring. An inter-molecular C-H⋯O inter-action involving the two acet-oxy groups generates a centrosymmetric dimer via an R(2) (2)(16) ring motif.

7-Phenyl-sulfonyl-2,3-dihydro-7H-1,4-benzodioxino[6,7-b]carbazole.

In the title compound, C(24)H(17)NO(4)S, the phenyl ring makes a dihedral angle of 88.12 (5)° with the carbazole unit. The mol-ecular structure is stabilized by weak intra-molecular C-H⋯O inter-actions and the crystal packing exhibits weak inter-molecular C-H⋯O and C-H⋯π inter-actions. Two C atoms of the 2,3-dihydro-1,4-dioxine fragment are disordered over two positions with site-occupancy factors of 0.718 (11) and 0.282 (11).