The crystal structures and Hirshfeld surface analysis of the 2-iodophenyl- and 4,5-difluoro-2-iodophenyl derivatives of benzenesulfonamide.

Two new benzene-sulfonyl derivatives, -(2-iodo-phen-yl)benzene-sulfonamide, CHINO, (), and -(4,5-di-fluoro-2-iodo-phen-yl)benzene-sulfonamide, CHFINOS, () were synthesized and structurally characterized. In both mol-ecular structures, the conformation of the N-C bond in the -SO-NH-C segment is relative to the S=O bond. For (), the crystal packing is dominated by N-H⋯O hydrogen-bonding inter-actions that link the mol-ecules into chains extending parallel to [010]. In the case of (), the mol-ecules are linked by N-H⋯O(S) hydrogen bonds into dimers that are located on centers of inversion. These findings are consistent with the results of Hirshfeld surface analyses.