Tautomeric Schiff bases: Iono-, solvato-, thermo- and photochromism

The complexing properties of oxalodihydrazide, acethydrazide and formic hydrazide with Cu(II) in aqueous solution

“…Intramolecular proton transfer occurs between the enol (OH) form predominating in alkaline medium and the keto (NH) form predominating in an acidic environment [11,39]. The solvent polarity and specific interactions with the solvent molecules influence the enol-keto equilibrium where polar solvents shift the equilibrium toward the keto form [40,41]. Wide pH ranges in the potentiometric titrations of the ligands permit the appearance of both tautomers.…”

Synthesis, thermal study and some properties of N2O4—donor Schiff base and its Mn(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes

“…Special attention is paid to the aromatic Schiff bases with OH group in the ortho position to the amino group. This type of Schiff base compounds shows thermo-and photochromism providing potential applications as data storage, information processing, telecommunications and optical switching [10,[17][18][19].…”

Diorganotin(IV) complexes with 2-furancarboxylic acid hydrazone derivative of benzoylacetone: Synthesis, X-ray structure, antibacterial activity, DNA cleavage and molecular docking

“…The derived Schiff bases have keto-enol tautomerism with strong intramolecular hydrogen bonds (NH…O or N…HO). They are of biological interest, play as synthetic intermediates in organic reactions and act as sensor materials [4][5][6]. These compounds can also be used as coordination ligands for transition and non-transition metals; however, less attention has been paid to this type of systems.…”