(3-Chloro­prop­yl)triphenyl­phospho­nium bromide

The title compound, C₂₁H₂₁ClP⁺Br⁻, is the bromide salt of a mixed aryl-alkyl phospho­nium cation. C–P–C angles span a range of 107.20 (10)–111.18 (10)°. The non-H atoms of the 3-chloro­propyl group adopt a staggered conformation [C–C–C–Cl torsion angle: −72.0 (3)°]. In the crystal, C—H...Br contacts connect the entities of the title compound into a double zigzag chain along b. These chains are linked into a supra­molecular layer lying parallel to (10-1) by C—H...π inter­actions.

Quinolin-3-amine

In the crystal structur of the achiral title compound, C₉H₈N₂, N—H...N hydrogen bonds connect the mol­ecules into zigzag chains in [100]. Weak inter­molecular N–H...π inter­actions further consolidate the crystal packing.

1-[5-Acetyl-2,6-dimethyl-4-(5-phenyl-1H-pyrazol-3-yl)-1,4-dihydro­pyridin-3-yl]ethanone monohydrate

In the title compound, C₂₀H₂₁N₃O₂·H₂O, the aza-substitued six-membered ring adopts a ^L4B conformation. In the crystal, classical N—H...O, N—H...N and O—H...O hydrogen bonds connect the entities into a three-dimensional network. Intra­molecular C—H...O contacts are also observed.

3-(4-Chloro­phen­yl)-5-phenyl-4,5-di­hydro-1,3-oxazole

In the title compound, C₁₅H₁₂ClNO, the isoxazoline ring adopts an envelope conformation with the C atom bearing an unsubstituted phenyl ring as the flap atom. The chlorinated phenyl group is nearly in-plane with the four coplanar atoms of the heterocycle and the corresponding mean planes enclosing an angle of 1.16 (7)°. The unsubstituted phenyl group attached to the envelope flap atom approaches a nearly perpendicular orientation relative to the isoxazoline ring with a dihedral angle of 74.93 (7)°. In the crystal, weak C—H...O, C—H...N and C—H...π inter­actions connect the mol­ecules into layers perpendicular to the a axis.

3,5-Bis(4-fluoro­phen­yl)-1-(4-nitro­phen­yl)-4,5-dihydro-1H-pyrazole

In the title compound, C₂₁H₁₅F₂N₃O₂, a pyrazole derivative bearing three aromatic substituents, the central five-membered heterocyclic ring makes dihedral angles of 1.77 (14), 3.68 (13) and 72.15 (14)° with the three benzene rings. In the crystal, C—H...O and C—H...F inter­actions connect the mol­ecules into double layers parallel to the bc plane.

Ethyl (Z)-3-(4-methyl­anilino)-2-[(4-methyl­phen­yl)carbamo­yl]prop-2-enoate

The title compound, C₂₀H₂₂N₂O₃, is a secondary amine featuring an amide and an ester functionality in connection with a Michael system. The conformation about the C=C bond is E. Intra­molecular N—H...O hydrogen bonds occur. In the crystal, C—H...O contacts connect the mol­ecules into chains along the b-axis direction.