3-Methyl-1,5-diphenyl-4,5-dihydro-1H-pyrazole

In the title compound, C₁₆H₁₆N₂, the dihydro­pyrazole ring adopts a shallow envelope conformation, with the C atom bearing the phenyl group displaced by 0.298 (2) Å from the other atoms (r.m.s. deviation = 0.015 Å). The dihedral angles between the four near coplanar atoms of the central ring and the N- and C-bonded phenyl groups are 13.49 (13) and 82.22 (16)°, respectively.

7-Bromo-3,3-dibutyl-8-meth­oxy-2,3-di­hydro-1,5-benzothia­zepin-4(5H)-one

In the title compound C₁₈H₂₆BrNO₂S, the thia­zepine ring adopts a boat conformation. The dihedral angle between the mean planes through the benzene ring and the four C atoms making up the basal plane of the boat is 35.8 (2)°. In the crystal, inversion dimers linked by pairs of N—H...O hydrogen bonds generate R₂²(8) loops.

2-(4-Fluoro­phen­yl)-4-(thio­phen-2-yl)-2,3-di­hydro-1,5-benzothia­zepine

In the title compound, C₁₉H₁₄FNS₂, the seven-membered thia­zepine ring adopts a slightly distorted twist boat conformation. The dihedral angle between the benzene rings is 53.6 (1)°. The mean plane of the thia­zepine ring is twisted by 34.3 (7)° and 36.6 (7)° from the benezene rings. A C—H...F interaction generates stacking of molecules along the ab plane.