Date Published: August 01, 2012
Publisher: International Union of Crystallography
Author(s): Muhammad Nadeem Arshad, Muhammad Danish, Muhammad Nawaz Tahir, Savera Khalid, Abdullah M. Asiri.
In the title compound, C12H16N2O6S, the S atom adopts a distorted tetrahedral geometry with an O—S—O angle of 119.76 (13)°. The nitro group is twisted by 35.34 (2)° with respect to the aromatic ring; it accepts an N—H⋯O hydrogen bond, resulting in a S(7) motif. In the crystal, N—H⋯O and O—H⋯O hydrogen bonds connect the molecules into an infinite chain along the a axis. The methyl C atoms of the isopropyl group are disordered in a 1:1 ratio.
For a related structure, see: Arshad et al. (2010 ▶), For graph-set notation, see: Bernstein et al. (1995 ▶).