Inglebert S Antony, Arun Yuvaraj, Sethusankar K, Perumal Paramasivam T
Sri Ram Engineering College, Chennai 602 024, India.
Acta Crystallogr Sect E Struct Rep Online. 2013 Sep 25;69(Pt 10):o1585. doi: 10.1107/S1600536813025890. eCollection 2013.
In the title compound, C26H20N4O2S, the central pyrrolidine ring adopts a twist conformation on the C-C bond involving the spiro C atom. Its mean plane makes dihedral angles of 78.83 (14), 65.91 (15) and 44.49 (18)° with the mean planes of the adjacent oxindole ring system, the indole system and the thio-phene ring, respectively. The indole and indoline units are essentially planar, with maximum deviations of 0.019 (3) and 0.090 (3) Å, respectively. In the oxindole fused-ring system, the pyrrole ring adopts an envelope conformation with the spiro C atom as the flap. In the crystal, pairs of N-H⋯O hydrogen bonds link the mol-ecules, forming inversion dimers with an R (2) 2(8) ring motif. The dimers are linked by further N-H⋯O hydrogen bonds, forming a two-dimensional network lying parallel to (100).
在标题化合物C26H20N4O2S中，中心吡咯烷环在涉及螺碳原子的C-C键上呈扭曲构象。其平均平面与相邻的氧化吲哚环系、吲哚环系和噻吩环的平均平面分别形成78.83 (14)°、65.91 (15)°和44.49 (18)°的二面角。吲哚和二氢吲哚单元基本呈平面状，最大偏差分别为0.019 (3) Å和0.090 (3) Å。在氧化吲哚稠环体系中，吡咯环以螺碳原子为瓣呈信封构象。在晶体中，成对的N-H⋯O氢键连接分子，形成具有R (2) 2(8)环 motif的反演二聚体。二聚体通过进一步的N-H⋯O氢键连接，形成平行于(100)的二维网络。
