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2-Amino­pyridin-1-ium triiodide

The asymmetric unit of the title compound, C(5)H(7)N(2) (+.)I(3) (−), consists of one 2-amino­pyridin-1-ium cation (apyH(+)) and one triiodide anion, both located in general postions. The apyH(+) cation is planar within the experimental uncertainties. The short N—C distance [1.328 (5) Å] of the exoc...

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Detalles Bibliográficos
Autores principales: Reiss, Guido J., Leske, Peer B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3772490/
https://www.ncbi.nlm.nih.gov/pubmed/24046633
http://dx.doi.org/10.1107/S1600536813015389
Descripción
Sumario:The asymmetric unit of the title compound, C(5)H(7)N(2) (+.)I(3) (−), consists of one 2-amino­pyridin-1-ium cation (apyH(+)) and one triiodide anion, both located in general postions. The apyH(+) cation is planar within the experimental uncertainties. The short N—C distance [1.328 (5) Å] of the exocyclic NH(2) group is typical for the imino-form of protonated 2-amino­pyridines. Consequently, the bond lengths within the six-membered ring vary significantly. The geometric parameters of the triiodide anion are in the typical range, with bond lengths of 2.8966 (3) and 2.9389 (3) Å and a bond angle of 176.02 (1)°. In the crystal, N—H ⋯ I hydrogen bonds connect adjacent ions into screwed chains along the b-axis direction. These chains are twisted pairwise into rectangular rods. The pyridinium moieties of neighbouring rods are arranged parallel to each other with a plane-to-plane distance of 3.423 (5) Å.