Intramolecular hydrogen bonding and tautomerism in Schiff bases. Structure of N -(2-pyridil)-2-oxo-1-naphthylidenemethylamine

Controlling Solvate Formation of a Schiff Base by Combining Mechano-chemistry with Solution Synthesis

“…[21][22][23] Schiff bases derived from ohydroxyaromatic aldehydes and ketones have shown to be excellent models for the study of keto-enol tautomerism both in solution and in the solid state. [24][25][26][27][28] Such Schiff bases have drawn attention due to their physical properties in the crystalline state which are greatly influenced by the topochemistry of the Schiff base molecules which in turn is highly affected by the crystal structure. [29][30][31][32][33] During the past decade it became wellrecognised that solvent-free synthesis and mechanochemistry are effective for the efficient and rapid synthesis of a wide range of imines.…”

Synthesis of Some New Anils: Part 1. Reaction of 2-Hydroxy-benzaldehyde and 2-Hydroxynaphthaldehyde with 2-Aminopyridene and 2-Aminopyrazine

“…The hydrogen bonding and tautomerism of Schiff bases and the tautomeric forms at 50% abundance have been reported in the crystalline state for the Schiff base formed by 3-haloanilines and 2-hydroxy-1-naphthaldehyde [3]. The Schiff base compounds can be classified according to their photo-and thermochromic characteristics [24][25]. Thermochromism is due to a change in theelectron configuration induced by proton transfer, which can occur in the ground state and requires a planar molecular system.…”

Schiff Bases Derived from 2-Hydroxynaphthalene-1-carbaldehyde and their Metal Complexes

“…The impact of aromatic ring moiety with naphthalene has been examined. In this work, they found that phenol-azomethine and keto-amine balance moved overwhelmingly to keto-amine side [45] (Fig. 7).…”

“…Intra-molecular hydrogen binding and tautomerism in the synthesized N-(2-pyridyl)-2-oxo-1-naphthylidenemethylamine was reported by Nazir et al [45] using infrared spectroscopy and X-ray beam diffraction studies [46]. The impact of aromatic ring moiety with naphthalene has been examined.…”