Experimental Crystal data

R factor = 0.039; wR factor = 0.074; data-to-parameter ratio = 9.5. There are two independent molecules in the asymmetric unit of the title compound, C14H14N2O4S, in which the dihedral angles between the benzene rings are 56.22 (15) and 58.16 (14). In the crystal, N—H Onitro hydrogen bonds link the molecules into zigzag chains running along the a-axis direction. Related literature For studies on the effects of substituents on the structures an