Crystal structure of 2,6-di-amino-pyridinium chloride

• Published in: Acta crystallographica. Section E, Crystallographic communications Vol. 72; no. Pt 3; pp. 331 - 333
• Main Authors: Mastalir, Matthias, Schroffenegger, Martina, Stöger, Berthold, Weil, Matthias, Kirchner, Karl
• Format: Journal Article
• Language: English
• Published: England International Union of Crystallography 01.03.2016
• Subjects: Research Communications; crystal structure; hydrogen bonding; hybrid salt; 2,6-di­amino­pyridinium cation
• ISSN: 2056-9890; 2056-9890
• DOI: 10.1107/S2056989016002425

The asymmetric unit of the title salt, C5H8N3 (+)·Cl(-), comprises one half of the 2,6-di-amino-pyridinium cation (the other half being completed by the application of mirror symmetry) and one Cl(-) counter-anion, also located on the mirror plane. The amino N atom shows a significant pyramidalization, with a dihedral angle of 30.4 (14)° between the least-squares planes of the amino group and the non-H atoms of the 2,6-di-amino-pyridinium moiety. In the crystal, the cationic mol-ecules and Cl(-) counter-anions are arranged in sheets parallel to (001) consisting of alternating polar and non-polar parts associated with the the Cl(-) anions, pyridinium and amino moieties, and the pyridine rings, respectively. N-H⋯Cl inter-actions within the polar part, as well as slipped π-π inter-actions in the non-polar part, help to establish the three-dimensional network.