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

Abstract

Key indicatorsSingle-crystal X-ray study T = 273 K Mean (C-C) = 0.004 Å R factor = 0.028 wR factor = 0.076 Data-to-parameter ratio = 13.2For details of how these key indicators were automatically derived from the article, see

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

“…1). The bond lengths and angles of the pyridine ring in (I) are normal and are comparable to those in five related structures, namely 2-amino-1-(4-nitrobenzyl)pyridinium bromide, (II) (Sundar et al, 2006a), 3-amino-1-(4-nitrobenzyl)pyridinium bromide, (III) (Sundar et al, 2006b), 2-aminopyridine, (IV) (Chao et al, 1975a), 3-aminopyridine, (V) (Chao et al, 1975b), and 4aminopyridine, (VI) (Chao & Schempp, 1977).…”

Crystal structure of 3-amino-1-propylpyridinium bromide

“…1. The geometrical parameters of the cation moiety are comparable with those of a related structure, 3-amino-1-(4nitrobenzyl)pyridinium bromide (Sundar et al, 2006). The molecular structure of the two cations are very similar with weighted and unit-weight r.m.s.…”

“…(3) 167Symmetry codes: (i) x À 1; y; z; (ii) x À 1 2 ; Ày þ 1 2 ; Àz þ 1; (iii) Àx þ 3 2 ; Ày; z À 1 2 ; (iv) x þ 1 2 ; y; Àz þ 1 2 ; (v) x þ 1; y; z. Sundar et al, 2006). The mean planes of the substituent groups at the ring N atom make dihedral angles of ca 80.3 with the 3-aminopyridinium ring in IVAWUY and ca 86.6 in PABTIX.…”

Synthesis, characterization and antimicrobial activity of 4-amino-1-alkyl pyridinium salts

“…We have also reported a simple method for the preparation of 2-amino-1-(4-nitrobenzyl) pyridinium bromide salts and related compounds. In order to improve the yield, we have made minor changes to the method already reported by us (Seethalakshmi et al, 2006a, b;Sundar et al, 2006). Accordingly, a mixture of 4-aminopyridine (1 equivalent) and 1-bromo-n-alkyl halides (1.2 equivalent) in acetone (dry) was stirred at room temperature for 12 h to get the desired quaternary aminopyridinium salts in high yield, 85-90% (Scheme 1).…”