“…BTG thanks the Alexander von Humboldt Foundation, Bonn, Germany, for extensions of his research fellowship. As part of a study of substituent effects on the structures of N-(aryl)-arylsulfonamides (Gowda et al, 2008(Gowda et al, , 2009a, in the present work, the structure of 2,4-dimethyl-N-(3,4-dichlorophenyl)benzenesulfonamide (I) has been determined. The conformations of the N-C bond in the C-SO 2 -NH-C segment are trans and gauche to the S=O bonds (Fig.…”