2,3-Diaminopyridinium 6-carboxypyridine-2-carboxylate

Abstract

The asymmetric unit of the title proton-transfer compound, C5H8N3 +·C7H4NO4 −, consists of one mono-deprotonated pyridine-2,6-dicarb­oxy­lic acid as anion and one protonated 2,3-diamino­pyridine as cation. The crystal packing shows extensive O—H⋯O, N—H⋯O and N—H⋯N hydrogen bonds. Thre are also several π–π inter­actions between the anions and also between the cations [centriod–centroid distances = 3.6634 (7), 3.7269 (7), 3.6705 (7) and 3.4164 (7) Å].

1-[4-(4-Fluorophenyl)-6-methyl-2-sulfanylidene-1,2,3,4-tetrahydropyrimidin-5-yl]ethanone

“…Our research group focus on synthesis of new proton transfer compounds especially from pyridine dicarboxcylic acids (Aghabozorg et al 2008) and different organic bases with nitrogen donor sites such as propane-1,3-diamine (Aghabozorg et al, 2011a), diethylenetriamine (Aghabozorg et al, 2011c), 2-amino-4-methylpyridine (Aghabozorg et al, 2011b;Sharif et al, 2010) and 2,3-diaminopyridine (Foroughian et al, 2011). There are also several proton transfer compound have been reported in which citrate exist as anion (Chen et al, 2003) and dicyclohexylamine as cation (Jin et al, 2004).…”