| Summary: | The asymmetric unit of the title compound, C28H21NO3S, contains two molecules with similar geometries. The thiazolidine rings adopt half-chair conformations while the pyrrolidine and the diketo-substituted five-membered carbocyclic rings are in envelope conformations with the spiro C atoms at the flaps. In one molecule, the phenyl ring forms dihedral angles of 57.76 (12) and 71.79 (12)° with the fused benzene rings and the fused benzene rings form a dihedral angle of 57.75 (13)°. The corresponding dihedral angles in the other molecule are 60.04 (12), 72.93 (12) and 54.51 (13)°. The molecular structure is stabilized by intramolecular C—H⋯O hydrogen bonds, which generate S(6) ring motifs. In the crystal, molecules are linked via C—H⋯O and C—H⋯N hydrogen bonds into layers lying parallel to the ab plane.
|
|---|