4-Amino-1-(4-nitrobenzyl)pyridinium bromide

Abstract

In the title compound, C12H12N3O2+·Br−, the bromide anion and most atoms of the cation lie on a mirror plane. In the cation, the pyridine and benzene rings are almost orthogonal to each other, forming a dihedral angle of 89.2 (1)°. The crystal packing is stabilized by weak N—H⋯Br and C—H⋯O inter­molecular hydrogen bonds.

4-Amino-(1-methylphenyl)pyridinium bromide

“…1. The bond lengths and angles within the pyridinium ring are normal and comparable with those reported for related structures (Sundar et al, 2004a(Sundar et al, ,b, 2005(Sundar et al, , 2006(Sundar et al, , 2006a. In (I), the dihedral angle between the planes of the pyridine and benzene rings is 80.0 (1) .…”

“…In (I), the dihedral angle between the planes of the pyridine and benzene rings is 80.0 (1) . In related structures, this angle is 85.0 (1) for 2-amino-1-(4-nitrobenzyl)pyridinium bromide (Sundar et al, 2006a), 88.7 (1) for 3amino-1-(4-nitrobenzyl)pyridinium bromide (Sundar et al, 2006b) and 89.2 (1) for 4-amino-1-(4-nitrobenzyl)pyridinium bromide (Sundar, Parthasarathi, Ravikumar et al, 2006).…”

4-Amino-(1-ethoxycarbonylmethyl)pyridinium iodide

“…1. The bond lengths and angles within the pyridinium ring are normal and comparable with those reported for related structures (Seethalakshmi et al, 2006;Sundar et al, 2004aSundar et al, ,b, 2005Sundar et al, 2006Sundar et al, , 2006a. The N1-C6-C7-O1, C6-C7-O1-C8 and C7-O1-C8-C9 torsion angles in (I) ( Table 1) indicate that the ethoxycarbonylmethyl group is in an extended conformation.…”