Crystal structures ofN′-aminopyridine-2-carboximidamide andN′-{[1-(pyridin-2-yl)ethylidene]amino}pyridine-2-carboximidamide

Abstract

The crystal structures ofN′-aminopyridine-2-carboximidamide (C6H8N4),1, andN′-{[1-(pyridin-2-yl)ethylidene]amino}pyridine-2-carboximidamide (C13H13N5),2, are described. The non-H atoms in compound1are nearly planar (r.m.s. deviation from planarity = 0.0108 Å), while2is twisted about the central N—N bond by 17.8 (2)°. Both molecules are linked by intermolecular N—H...N hydrogen-bonding interactions;1forms a two-dimensional hydrogen-bonding network and for2the 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.

Iron(III), cobalt(II) and zinc(II) coordination compounds with a carboximidamide ligand: Synthesis, structures and properties

“…In previous work, we have described the crystal structure of the N-H ⋯ N bounded networks of the N′-{[1-(pyridin-2-yl)ethylidene]amino}pyridine-2-carboximidamide molecule and its precursor N'-amino-pyridine-2-carboximidamide [12]. As part of the continuing investigation, we here complete the library of carboxamidrazone complexes through the synthesis and structural investigation of new iron(III) [13], cobalt(II) [14], and zinc(II) [15] complexes (Figure 1B), in which the metal-ion centres are bridged by single bonds to the polydentate ligand…”