The title compound, C25H21BrN2O2, was synthesized by the reaction of 5‐meth­oxy‐1H‐indole and 4‐bromo­benzaldehyde in ethanol, using CuBr2 as a catalyst under microwave irradiation. In the crystal structure, there is an inter­molecular N—H⋯O hydrogen bond and two inter­molecular C—H⋯π contacts.

Key indicatorsSingle-crystal X-ray study T = 293 K Mean (C-C) = 0.002 Å R factor = 0.024 wR factor = 0.077 Data-to-parameter ratio = 14.4For details of how these key indicators were automatically derived from the article, see

The title compound, C13H13N2 +·I−, is a derivative of 1-amino­pyridinium iodide. The pyridine and benzene rings are oriented at a dihedral angle of 45.78 (3)°. In the crystal structure, weak inter­molecular C—H⋯I hydrogen bonds link the mol­ecules.

In the title compound, C12H10ClN2 +·I−, the aromatic rings are oriented at a dihedral angle of 54.55 (3)°. In the crystal structure, inter­molecular C—H⋯I and C—H⋯Cl hydrogen bonds link the mol­ecules.

Key indicatorsSingle-crystal X-ray study T = 293 K Mean (C-C) = 0.004 Å R factor = 0.057 wR factor = 0.181 Data-to-parameter ratio = 14.2 For details of how these key indicators were automatically derived from the article, see