2-Amino-pyridin-1-ium triiodide.

ABSTRACT: The asymmetric unit of the title compound, C5H7N2 (+.)I3 (-), consists of one 2-amino-pyridin-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 NH2 group is typical for the imino-form of protonated 2-amino-pyridines. 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

SUBMITTER: Reiss GJ 

PROVIDER: S-EPMC3772490 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature