A triclinic polymorph of N-[4-(4-methyl-benzenesulfonamido) phenylsulfonyl]-acetamide

In the asymmetric unit of the title compound, C15H16N2O5S2, there are two symmetry-independent molecules which adopt similar conformations, with dihedral angles between the aromatic rings of 59.30 (8) and 61.81 (8)degrees, and dihedral angles between acetamide group and the benzene ring of 77.08 (10) and 78.40 (10)degrees. Each type of molecule forms similar one-dimensional polymeric structures extending along the b axis via N-H center dot center dot center dot O hydrogen bonds. These hydrogen bonds generate two types of centrosymmetric motifs, R-2(2)(8) and R-2(2)(20). Moreover C-H center dot center dot center dot O interactions assemble the molecules into a three-dimensional framework. The crystal structure was determined from a non-merohedral twin [ratio of the twin components = 0.322 (4):0.678 (4)].