Crystal structure of 5′′-(4-chlorobenzylidene)-4′-(4-chlorophenyl)-1′-methyltrispiro[acenapthylene-1,2′-pyrrolidine-3′,1′′-cyclohexane-3′′,2′′′-[1,3]dioxane]-2(1H),6′′-dione

Abstract

In the title compound, C36H29Cl2NO4, two spiro links connect the methyl-substituted pyrrolidine ring to the ace­naphthyl­ene and cyclo­hexa­none rings. The cyclo­hexa­none ring is further connected to the dioxalane ring by a third spiro junction. The five-membered ring of the ace­naphthylen-1-one ring system adopts a flattened envelope conformation, with the ketonic C atom as the flap, whereas the dioxalane and pyrrolidine rings each have a twist conformation. The cyclo­hexenone ring assumes a boat conformation. An intra­molecular C—H⋯O hydrogen-bond inter­action is present. In the crystal, mol­ecules are linked by non-classical C—H⋯O hydrogen bonds, forming chains extending parallel to the a axis.

Crystal structure of 5′′-benzylidene-1′-methyl-4′-phenyltrispiro[acenaphthylene-1,2′-pyrrolidine-3′,1′′-cyclohexane-3′′,2′′′-[1,3]dioxane]-2,6′′-dione

“…The mean planes through the cyclohexanone and dioxalane rings form a dihedral angle of 77.99 (8) . Bond lengths and angles are not unusual and in good agreement with the recently reported values of a related trispiropyrrolidine compound (Chandralekha et al, 2015). Three intramolecular C-HÁ Á ÁO hydrogen bonds (Table 1) are present, involving both ketonic O atoms as acceptors.…”

5′-Benzylidene-1′′-methyl-4′′-phenyltrispiro[1,3-dioxolane-2,1′-cyclohexane-3′,3′′-pyrrolidine-2′′,3′′′-indole]-4′,2′′′-dione

“…intramolecular C-HÁ Á ÁO hydrogen bond occurs. The geometrical parameters of the title compound are in good agreement with those previously reported for trispiropyrrolidine compounds (Chandralekha et al, 2015(Chandralekha et al, , 2016. In the crystal, molecules are linked by weak C-HÁ Á ÁO and N-HÁ Á ÁO interactions (Table 1), forming chains extending along the b-axis direction (Fig.…”