Crystal structures of N′-aminopyridine-2-carboximidamide and N′-{[1-(pyridin-2-yl)ethylidene]amino}pyridine-2-carboximidamide

• Main Authors: Francois Eya'ane Meva, Timothy John Prior, David John Evans, Emmanuel Roland Mang
• Format: Article
• Language: English
• Published: International Union of Crystallography 2017-07-01
• Series: Acta Crystallographica Section E: Crystallographic Communications
• Subjects: crystal structure; pyridine-2-carboximidamide; N′-{[1-(pyridin-2-yl)ethylidene]amino}pyridine-2-carboximidamide
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S2056989017008416
• ISSN: 2056-9890

The crystal structures of N′-aminopyridine-2-carboximidamide (C6H8N4), 1, and N′-{[1-(pyridin-2-yl)ethylidene]amino}pyridine-2-carboximidamide (C13H13N5), 2, are described. The non-H atoms in compound 1 are nearly planar (r.m.s. deviation from planarity = 0.0108 Å), while 2 is twisted about the central N—N bond by 17.8 (2)°. Both molecules are linked by intermolecular N—H...N hydrogen-bonding interactions; 1 forms a two-dimensional hydrogen-bonding network and for 2 the network is a one-dimensional chain. The bond lengths of these molecules are similar to those in other literature reports of azine and diimine systems.