N-(2-Amino-5-chloro­phen­yl)-2-bromo­benzene­sulfonamide

In the title compound, C₁₂H₁₀BrClN₂O₂S, the sulfonamide group adopts a staggered conformation about the N—S bond [the C—S—N—H torsion angle is 97 (3)°] with the N-atom lone pair bis­ecting the O=S=O angle. For the C(Ar)—S bond, the ortho-substituted C atom bis­ects one of O=S–N angles [the C—C—S—N torsion angle is −57.7 (3)°]. The mean planes of the aromatic rings form a dihedral angle of 75.1 (1)°. In the crystal, mol­ecules form inversion dimers through pairs of N—H...NH₂ hydrogen bonds. The mol­ecules are further consolidated into layers along the bc plane by weaker N—H...O inter­actions.

2,5-Bis[2-({bis­[3-(dimethyl­aza­nium­yl)prop­yl]aza­nium­yl}meth­yl)phen­yl]-1,3,4-oxadiazole hexa­kis­(perchlorate) sesquihydrate

In the title hydrated salt, C₃₆H₆₆N₈O⁶⁺·6ClO₄⁻·1.5H₂O, the asymmetric unit consists of a hexa­protonated [H₆L]⁶⁺ cation, five perchlorate anions in general positions, two on twofold rotation axes (one of which is disordered), and two water mol­ecules of crystallization in general positions, one of them disordered around a twofold crystallographic axis. In the [H₆L]⁶⁺ cation, two strong intra­molecular N—H...N hydrogen bonds occur, involving the N atoms of the oxadiazole ring as acceptors and the closest NH⁺ groups of each dipropyl­enetriamine unit. In the crystal, the [H₆L]⁶⁺ cations form channels along the a-axis direction, in which the perchlorate counter-ions and the water mol­ecules are lodged. The crystal packing features a network of N—H...O and O—H...O hydrogen bonds involving the NH⁺ groups of the [H₆L]⁶⁺ cation, the perchlorate anions and the water mol­ecules.