1,3-Bis(1-phenyl­eth­yl)imidazolidine-2-thione

The complete molecule of the title compound, C₁₉H₂₂N₂S, is generated by crystallographic twofold symmetry with the C=S group lying on the rotation axis. The imidazolidine ring adopts a flattened twist conformation. The dihedral angle between the asymmetric part of the imidazolidine-2-thione fragment and the benzene ring is 89.49 (17)°.

N-Methyl­pyrrolidine-1-carbothio­amide

There are two independent mol­ecules in the asymmetric unit of the title compound, C₆H₁₂N₂S, in which the N-methyl­thio­formamide unit and the pyrrolidine ring mean plane are oriented at dihedral angles of 5.9 (5) and 5.9 (4)°. In the crystal, zigzag C(4) chains extending along the a axis are formed due to N—H...S hydrogen bonds between alternate arrangements of mol­ecules. The chains are inter­linked by C—H...S hydrogen bonds.

2-(6-Meth­oxy­naphthalen-2-yl)-1-(morpholin-4-yl)propan-1-one

In the title compound, C₁₈H₂₁NO₃, the naphthalene group and the basal plane of the morpholine ring (r.m.s. deviations = 0.0177 and 0.0069 Å, respectively) are oriented at a dihedral angle of 44.0 (2)°. In the crystal, mol­ecules are linked by C—H...π inter­actions.

2-(4-Isobutyl­phen­yl)-1-(morpholin-4-yl)propan-1-one

In the title compound, C₁₇H₂₅NO₂, the morpholine ring adopts a chair conformation. The benzene ring makes a dihedral angle of 39.81 (13)° with the basal plane of the morpholine group.

2-(4-Methyl­phen­yl)-2-oxoethyl 3-bromo­benzoate

The mol­ecule of the title compound, C₁₆H₁₃BrO₃, is built of two approximately planar fragments, viz. 3-bromo­benzoate [maximum deviation = 0.055 (2) Å and 2-oxo-2-p-tolyl­ethyl [maximum deviation = 0.042 (2) Å], inclined by 46.51 (7)°. In the crystal, weak C—H...O hydrogen bonds and Br...Br contacts [3.6491 (7) Å] connect the mol­ecules into infinite layers parallel to (-221).