title: 5,6-Dimeth-oxy-4',5'-diphenyl-indane-2-spiro-3'-pyrrolidine-2'-spiro-3''-indoline-1,2''-dione.
abstract: In the title compound, C(33)H(28)N(2)O(4), the central pyrrolidine ring adopts a half-chair conformation. Both the indolinone and indanone groups are twisted, with their five-membered rings adopting a half-chair and an envelope conformation, respectively. The two benzene rings and the mean plane of the indolinone and indanone groups make dihedral angles of 71.98 (10), 84.32 (10), 86.26 (9) and 78.50 (9)°, respectively, with the central pyrrolidine ring. Intra-molecular C-H⋯O hydrogen bonds stabilize the mol-ecular conformation. In the crystal, pairs of inter-molecular N-H⋯O hydrogen bonds link the mol-ecules into centrosymmetric dimers. The dimers are inter-connected into ribbons propagating along [110] via weak inter-molecular C-H⋯O hydrogen bonds. Weak inter-molecular C-H⋯π and π-π [centroid-centroid distance = 3.6509 (11) Å] inter-actions are also observed.
authors.forename: Mohamed Ashraf
authors.initials: MA
authors.lastname: Ali
authors.forename: Rusli
authors.initials: R
authors.lastname: Ismail
authors.forename: Soo Choon
authors.initials: SC
authors.lastname: Tan
authors.forename: Chin Sing
authors.initials: CS
authors.lastname: Yeap
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun