Crystal structure of ethyl 1′,5-dimethyl-2′′,3-dioxo-3H-di­spiro­[benzo[b]thiophene-2,3′-pyrrolidine-2′,3′′-indoline]-4′-carboxyl­ate

Acta Crystallographica Section E: Crystallographic Communications

Suresh, M.¹  Raghunathan, R.¹  Govindaraj, J.²  SubbiahPandi, A.³  Raja, R.³ 

[1] Department of Organic Chemistry, University of Madras, Guindy campus, Chennai 602 025, India;Department of Physics, Pachaiyappa's College for Men, Kanchipuram 631 501, India;Department of Physics, Presidency College (Autonomous), Chennai 600 005, India

关键词: CRYSTAL STRUCTURE;    DISPIRO;    BENZOTHIOPHENE;    PYRROLIDINE;    INDOLINE;    HYDROGEN BONDING;   

DOI  :  10.1107/S2056989015001528

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

The title compound, C23H22N2O4S, crystallized with two independent mol­ecules (A and B) in the asymmetric unit. They have very similar conformations with the pyrrolidine ring having a twisted conformation, on the Cspiro—Cspiro bond, in both mol­ecules. In mol­ecule A, the mean planes of the benzo­thio­phene and indoline ring systems are inclined to the mean plane of the pyrrolidine ring by 87.59 (10) and 84.51 (11)°, respectively, and to one another by 72.69 (7)°. The corresponding angles in mol­ecule B are 87.15 (10), 84.58 (10) and 72.07 (7)°, respectively. In the crystal, the A and B mol­ecules are linked to one another by two N—H⋯O hydrogen bonds, forming a dimer. These dimers are linked via C—H⋯O hydrogen bonds, forming a three-dimensional structure.

【 授权许可】

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