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8357607 
Journal Article 
2-(2-Pyridylamino)pyridinium chloride phosphorous acid: one-dimensional hydrogen-bonded and pi-pi stacked supramolecular chains 
Beckmann, J; Duthie, A; Fesser, P; , 
2006 
Yes 
Acta Crystallographica. Section E: Structure Reports Online
ISSN: 1600-5368 
BLACKWELL PUBLISHING 
OXFORD 
O2151-O2152 
WOS:000237998600134 
In the crystal structure of the title compound, C10H10N3+.Cl-.[P(O)(OH)(2)H], the chloride ion and phosphorous acid form a one-dimensional hydrogen-bonded chain, while the 2-(2-pyridylamino)pyridinium cations form a second chain through pi-pi stacking. The two parallel chains are connected via a PO... H-N hydrogen bond and a weak pyridinium-to-chloride interaction.