N-[2-(4-Bromo­benzo­yl)eth­yl]isopropyl­aminium chloride

The crystal structure of the title compound, C₁₂H₁₇BrNO⁺·Cl⁻, is stabilized by N—H...Cl and C—H...O hydrogen bonds, forming a three-dimensional network. The inter­actions framework is completed by C—H...π contacts between a methyl­ene group and the benzene ring of a symmetry-related mol­ecule.

3-Anilinomethyl-5-chloro-1,3-­benzoxazol-2(3H)-one

In the title compound, C₁₄H₁₁ClN₂O₂, the 2,3-dihydro-1,3-benzoxazole ring system is essentially planar [maximum deviation = 0.009 (2) Å] and makes a dihedral angle of 79.15 (7)° with the phenyl ring. Inter­molecular N—H...O and weak C—H...Cl hydrogen bonds occur in the crystal structure.

N-(2-Benzoyl­eth­yl)propan-2-aminium chloride

In the title salt, C₁₂H₁₈NO⁺·Cl⁻, N—H...Cl inter­actions between the free chloride anions and the organic cations connect the mol­ecules into hydrogen-bond dimers, forming a R₂²(8) motif. The dimers are linked by C—H...O hydrogen bonds into chains extending along [301]. The carbonyl group is co-planar with the phenyl ring [C—C—C=O torsion angle = −3.3 (7)°]. The side chain has an E conformation.

N-[2-(4-Methyl­benzo­yl)eth­yl]propan-2-aminium chloride

In the title compound, C₁₃H₂₀NO⁺·Cl⁻, the protonated amino N atom is hydrogen bonded to the chloride anion. N—H...Cl hydrogen bonds link the anions and cations into dimers, which are connected by C—H...O hydrogen bonds, forming supra­molecular chains extending along [100].

1-[4-(4-Chloro­phen­yl)piperazin-1-yl]-3-(6-oxo-3,4-diphenyl-1,6-dihydro­pyridazin-1-yl)propan-1-one

In the title compound, C₂₉H₂₇ClN₄O₂, the six-membered ring of the pyridazine group is nearly planar [maximum deviation = −0.062 (2) Å] and its mean plane makes dihedral angles of 43.05 (9), 44.71 (10) and 72.57 (9)°, respectively, with the two phenyl and benzene rings. The piperazine ring has a chair conformation and its mean plane is almost perpendicular to the attached benzene ring, with a dihedral angle of 83.20 (16)°. In the crystal, mol­ecules are linked via two pairs of C—H...O inter­actions, which result in the formation of chains propagating along [10-1]. Neighbouring chains are linked via C—H...π inter­actions.