5-Chloro­quinolin-8-yl furan-2-carboxyl­ate

In the title compound, C₁₄H₈ClNO₃, the central ester CO₂ group is twisted away from the quinoline and furoyl rings by 57.46 (5) and 2.0 (1)°, respectively. In the crystal, mol­ecules are linked by weak C—H...O inter­actions, forming chains in [001].

2,4,6-Trinitro­phenyl 4-chloro­benzoate

In the title benzoate derivative, C₁₃H₆ClN₃O₈, the planes of the benzene rings form a dihedral angle of 63.46 (5)°. The dihedral angles between the benzene ring and its nitro groups are 12.78 (16)° for the first ortho, 28.4 (4) and 17.4 (4)° for the second (disordered) ortho and 3.58 (16)° for the para nitro group. The central ester moiety, –C—(C=O)—O–, is essentially planar (r.m.s. deviation for all non-H atoms = 0.0229 Å) and forms dihedral angles of 7.37 (14)° with the chloro-substituted benzene ring and 69.85 (6)° with the trinitro-substituted benzene ring. One of the nitro groups was refined as disordered over two sets of sites with fixed site occupancies of 0.61 and 0.39. In the crystal, mol­ecules are linked by weak C—H...O hydrogen bonds, forming a three-dimensional network.

2,2′-(Carbono­thio­yldisulfanedi­yl)bis­(2-methyl­propanoic acid)

The mol­ecular structure of the title compound, C₉H₁₄O₄S₃, exhibits intra­molecular C—H...S hydrogen bonds. In the crystal, pairs of O—H...O hydrogen bonds lead to the formation of centrosymmetric dimers, which are in turn connected by weak C—H...O inter­actions. The combination of these inter­actions generates edge-fused R₂²(8) and R₂²(20) rings running along [211].

4-Formyl-2-nitro­phenyl 4-bromo­benzoate

In the title compound, C₁₄H₈BrNO₅, the benzene rings form a dihedral angle of 62.90 (7)°. The central ester group is twisted away from the nitro-substituted and bromo-substituted rings by 71.67 (7) and 8.78 (15)°, respectively. The nitro group forms a dihedral angle of 7.77 (16)° with the benzene ring to which it is attached. In the crystal, mol­ecules are linked by weak C—H...O inter­actions, forming C(12) chains which run along [001]. Halogen–halogen inter­actions [Br...Br = 3.523 (3) Å] within the chains stabilized by C—H...O inter­actions are observed.

2,4,6-Tri­nitro­phenyl 3-chloro­benzoate

In the title benzoate derivative, C₁₃H₆ClN₃O₈, the planes of the benzene rings form a dihedral angle of 73.59 (7)°. The central ester unit forms an angle of 20.38 (12)° with the chloro-substituted benzene ring. In the crystal, mol­ecules are linked by weak C—H...O inter­actions, forming helical chains along [101] and [100].

(±)-3-(5-Amino-3-methyl-1-phenyl-1H-pyrazol-4-yl)-2-benzo­furan-1(3H)-one

In the title compound, C₁₈H₁₅N₃O₂, the benzo­furan ring system is essentially planar, the rings making a dihedral angle of 0.57 (9)°. The phenyl, furan and benzene rings subtend dihedral angles of 47.07 (10), 85.76 (7) and 86.04 (7)°, respectively, with the pyrazole ring. In the crystal, mol­ecules are linked by weak N—H...N, N—H...O and C—H...O inter­actions, generating edge-fused R₄⁴(20), and R₁²(7) rings linked into sheets which are parallel to (010).

2-[1′-(Benz­yloxy)spiro­[indane-1,2′-pyrrolidine]-5′-yl]aceto­nitrile

In the title compound, C₂₁H₂₂N₂O, the planes of the two six-membered rings make a dihedral angle of 89.51 (7)°. The pyrrolidine ring has a puckering amplitude q₂ = 0.418 (3) and a pseudo-rotation phase angle φ₂ = −166.8 (5), adopting a twist conformation (T). The other five-membered ring has a puckering amplitude q₂ = 0.247 (2) and a pseudo-rotation phase angle φ₂ = −173.7 (5), adopting an envelope conformation with the CH₂ atom adjacent to the C atom common with the pyrrolidine ring as the flap. In the crystal, mol­ecules are linked via C—H...N, enclosing R²₂(20) rings, forming chains propagating along [100]. The aceto­nitrile group is disordered over two positions and was refined with a fixed occupancy ratio of 0.56:0.44.

4-Formyl-2-nitro­phenyl 2-chloro­benzoate

In the title compound, C₁₄H₈ClNO₅, the benzene rings form a dihedral angle of 19.55 (9)°. The mean plane of the central ester group [r.m.s. deviation = 0.024 Å] forms dihedral angles of 53.28 (13) and 36.93 (16)°, respectively, with the nitro- and chloro-substituted rings. The nitro group forms a dihedral angle of 19.24 (19)° with the benzene ring to which it is attached. In the crystal, mol­ecules are linked by weak C—H...O hydrogen bonds, forming C(7) chains, which run along [100].