A spectroscopic study on the ionization of 2-, 3-, and 4-aminopyridines

Authors
Crisponi, G Aragoni, MC Casu, M Cristiani, F Marincola, FC Nurchi, VM
Citation
G. Crisponi et al., A spectroscopic study on the ionization of 2-, 3-, and 4-aminopyridines, ANN CHIM, 89(1-2), 1999, pp. 167-175
Citations number
14
Categorie Soggetti
Chemistry
Journal title
ANNALI DI CHIMICA
ISSN journal
00034592 → ACNP
Volume
89
Issue
1-2
Year of publication
1999
Pages
167 - 175
Database
ISI
SICI code
0003-4592(199901/02)89:1-2<167:ASSOTI>2.0.ZU;2-A
Abstract
The first ionization constants of the 2-, 3-, and 4-aminopyridines were eva luated by spectrophotometric methods using Evolving Factor Analysis approac h. The ionization constants of aniline and pyridine were estimated by poten tiometric methods in the same experimental conditions for comparison. A C-1 3 NMR spectroscopy study is here presented to assess the protonation site i n aminopyridines and to evaluate the resonance effects.