Received 23 February 2011
aDepartment of Physics, RKM Vivekananda College (Autonomous), Chennai 600 004, India,bDepartment of Organic Chemistry, University of Madras, Maraimalai Campus, Chennai 600 025, India, and cCentre of Advanced Study in Crystallography and Biophysics, University of Madras, Maraimalai Campus, Chennai 600 025, India
Correspondence e-mail: firstname.lastname@example.org
In the title compound, C20H21N2O5PS, the indole ring is essentially planar, with a maximum deviation of -0.0083 (18) Å. The methyl C atom of the methylphosphonate group and the S atom lie 0.104 (2) and -0.2158 (6) Å, respectively, from the indole mean plane. The sulfonyl-bound phenyl ring is almost perpendicular to the indole ring system, with a dihedral angle of 82.30 (8)°. The ethyl side chains are disordered over two sets of sites, with occupancy factors of 0.737 (5)/0.263 (5) and 0.529 (11)/0.471 (11). In the crystal, molecules are linked into centrosymmetric dimers via C-HO hydrogen bonds, resulting in an R22(18) graph-set motif. The crystal structure is further stabilized by C-H interactions.
For applications of indole derivatives, see: Stevenson et al. (2000); Ho et al. (1986); Rajeswaran et al. (1999). For comparison of molecular dimensions, see: Bassindale (1984); Sethu Sankar et al. (2002); Allen (1981). For graph-set motif notations, see: Bernstein et al. (1995).
Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT (Bruker, 2004); 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, 1997); 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: PV2393 ).
SK and KS thank the Technology Business Incubator (TBI), CAS in Crystallography and Biophysics, University of Madras, Maraimalai Campus, Chennai, and the Department of Science and Technology (DST) for data collection.
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