organic compounds
In the title compound, C18H14BrN3O2S, the three rings are nearly coplanar. In the crystal structure, intermolecular N—HN and C—HO hydrogen-bond interactions link the molecules into ribbons, displaying alternate rings of graph-set motifs R22(8) and R22(14).
organic compounds
The title compound, C18H13F3N4O2S, forms stacks via a three-dimensional hydrogen-bonding network, which involves intramolecular N—HO, intermolecular C—HO and paired N—HO hydrogen bonds.