Received 30 October 2012
aDepartment of Physics, S.M.K. Fomra Institute of Technology, Thaiyur, Chennai 603 103, India,bIndustrial Chemistry Laboratory, Central Leather Research Institute, Adyar, Chennai 600 020, India, and cDepartment of Physics, Presidency College (Autonomous), Chennai 600 005, India
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In the title compound, C22H21N3O4, the central pyrrolidine ring adopts a C-envelope conformation with a C atom 0.6593 (13) Å displaced from the mean plane formed by the remaining ring atoms. The indoline ring systems (r.m.s. devisations of 0.0356 and 0.0547 Å) are almost perpendicular to the mean plane of the pyrrolidine ring, making dihedral angles of 89.7 (6) and 82.5 (6)°. The acetate group attached to the pyrrolidine ring assumes an extended conformation. In the crystal,N-HO and C-HO hydrogen bonds connect adjacent molecules, forming an infinite tape extending along [1-1-1]. The crystal packing is further consolidated by strong - interactions with a centroid-centroid distance of 3.2585 (8) Å. The title compound is a polymorph of previously reported monoclinic structure [Ganesh et al. (2012). Acta Cryst. E68, o2902-o2903].
Data collection: APEX2 (Bruker, 2008); cell refinement: SAINT (Bruker, 2008); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 2012); software used to prepare material for publication: SHELXL97 and PLATON (Spek, 2009).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: PV2603 ).
The authors thank Dr Babu Varghese, SAIF, IIT, Chennai, India, for the data collection. ASP thanks the University Grants Commission, India, for a Minor Research Project.
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Ganesh, G., Yuvaraj, P. S., Govindan, E., Reddy, B. S. R. & SubbiahPandi, A. (2012). Acta Cryst. E68, o2902-o2903.
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Wei, A. C., Ali, M. A., Choon, T. S., Hemamalini, M. & Fun, H.-K. (2011). Acta Cryst. E67, o3125.