Structure of 2-Aminopyridinium Dihydrogendiphosphate Monohydrate

Bis(2-aminopyridinium) 2,5-dicarboxybenzene-1,4-dicarboxylate

“…E68, o1524 This work is a further contribution to the broad family of structural studies of 2-aminopyridinium (2-apyH) systems with hydrogen-bond donors. A considerable number of analogous materials formed from 2-aminopyridine and a given carboxylic acid has already been reported (Guelmami & Jouini, 2011;Chitra et al, 2008;Quah et al, 2008;Bis & Zaworotko, 2005;Büyükgüngör & Odabas˛ogˇlu, 2002;Odabas˛ogˇlu et al, 2003;etc). This is due to the fact that 2-aminopyridine is protonated in acidic solutions.…”

“…For similar and most common conformations of 2-aminopyridinium, see: Guelmami & Jouini (2011); Chitra et al (2008); Quah et al (2008); Bis & Zaworotko (2005); Bü yü kgü ngö r & Odabasoǧ lu (2002); Odabasoǧ lu et al (2003); Acheson (1967). For similar and most common conformations of 2,5-dicarboxybenzene-1,4-dicarboxylate, see: Dong et al (2011); Wang & Tang (2010).…”

Structural variety and dehydration in 3-aminopyridine–hypodiphosphoric acid–water system

“…In the literature one can find structural reports on co-crystals and salts of aminopyridines (2ap, 3ap and 4ap) with inorganic acids (nitrates, phosphates, sulphates, arsenates, perchlorates, selenates). 20–28 The analyses of the Cambridge Structural Database (CSD; 29 salts without metal ions) revealed that the vast majority of the deposited structures had pyridine nitrogen atom protonated, and very rarely the amino group was protonated. 30…”