In the course of studies on hybrid antibacterials incorporating 2-aryl-5-nitro-1Hindole
moieties as potential bacterial NorA efflux pump inhibitors, the compound 1-[2-(5-
nitro-1H-indol-2-yl)phenyl]methylpyridinium chloride (2) was synthesized and structurally
characterized. This pyridinium chloride salt crystallized in the monoclinic space group
P21/c with the following unit cell dimensions: a 10.274(3) Å, b 13.101(4) Å, c 13.439(4)
Å, β 107.702(7)°, V 1723.2(9) Å3, Z (f.u.) = 4; R1 = 0.048, and wR2 = 0.13. Of interest in
the single crystal X-ray structure is the (intramolecular) disposition of the pyridinium plane
over the indole heterocyclic residue [interplanar dihedral angle 17.91(4)°].