title: Ethyl (E)-3-[1'-ethyl-2-oxo-4'-(phenyl-sulfon-yl)-2H-spiro-[acenaphthyl-ene-1,2'-pyrrolidine]-3'-yl]acrylate.
abstract: In the title compound, C(28)H(27)NO(5)S, the five-membered pyrrolidine ring, which exhibits an envelope conformation (the C atom at the spiral junction being the flap atom), makes dihedral angles of 57.37 (10) and 86.84 (8)°, respectively, with the phenyl ring and the acenaphthyl-ene ring system. In the crystal, mol-ecules associate via two C-H⋯O hydrogen bonds, forming R(2) (2)(20) and R(2) (2)(10) graph-set motifs.
authors.forename: Ulaganathan
authors.initials: U
authors.lastname: Sankar
authors.forename: R
authors.initials: R
authors.lastname: Uma
authors.forename: S
authors.initials: S
authors.lastname: Sundaramoorthy
authors.forename: D
authors.initials: D
authors.lastname: Velmurugan