Ethyl 4-acetyl-5-oxo-3-phenyl-hexa-noate

2-(4-Methyl-phen-yl)-3-oxo-4-phenyl-2,3,3a,4,9,9a-hexa-hydro-1H-benzo[f]iso-indole-6-carbo-nitrile

In the title compound, C₂₆H₂₂N₂O, one phenyl ring, one five-membered N-heterocyclic ring and one six-membered carbocyclic ring make up the hexa­hydro­benzo[f]iso­indole core. Another phenyl group is attached to the heterocyclic N atom as a substituent. The non-aromatic five- and six-membered rings both exhibit boat conformations. In the crystal, weak C—H⋯O and C—H⋯N inter­actions establish the observed three-dimensional structure. The crystal studied was refined as an inversion twin.

4-(6-Benzyl-7-oxo-1,2,3,4,5,5a,5a1,6,7,7a,8,12b-dodecahydrobenzo[f]cycloocta[cd]isoindol-8-yl)benzonitrile

In the title compound, C₃₁H₃₀N₂O, the cis-fused cyclo­hexene and cyclo­octane rings adopt boat and boat-chair conformations, respectively. The essentially planar five-membered N-heterocyclic ring [r.m.s. deviation = 0.017 (1) Å] is cis- and trans-fused, respectively, with the cyclo­hexene and cyclo­octane rings. In the crystal, mol­ecules are linked into inversion dimers through pairs of weak C—H⋯O inter­actions.

4-(4-Fluoro-benzo-yl)-3-phenyl-3,4-di-hydro-naphthalen-1(2H)-one

In the title compound, C₂₃H₁₇FO₂, the cyclo­hexenone ring has an envelope conformation, the flap atom being the C atom to which the phenyl ring is attached. The 4-fluoro­benzoyl ring and the phenyl ring are inclined to one another by 28.77 (7)°, and by 52.00 (7) and 44.77 (7) °, respectively, to the aromatic ring fused to the cyclo­hexenone ring. In the crystal, mol­ecules are linked via C—H⋯O hydrogen bonds, forming a two-dimensional network lying parallel to (100).