Keto-enol tautomerism of (E)-2-[(3,4-dimethylphenylimino)methyl]-4-nitrophenol: Synthesis, X-ray, FT-IR, UV–Vis, NMR and quantum chemical characterizations

Synthesis, crystal structure and computational studies of a new Schiff base compound: (E)-4-bromo-2-ethoxy-6-{[(2-methoxyphenyl)imino]methyl}phenol

“…Prototropic tautomerism emerges from the intramolecular H-atom transfer between an enol-imine (Ö zdemir Tarı et al, 2016) and a keto-amine tautomer (Ö zek et al, 2006). The present work is part of our ongoing studies on Schiff bases (Ö zek Yıldırım et al, 2016(Ö zek Yıldırım et al, , 2017Albayrak et al, 2012). We report herein the synthesis, crystal structure and computational studies of the title compound, (E)-4-bromo-2-ethoxy-6-{[(2-methoxyphenyl)imino]methyl}phenol, obtained from the condensation of 5bromo-3-ethoxy-2-hydroxybenzaldehyde with 2-methoxyaniline.…”

Different chemical behaviors and antioxidant activity of three novel schiff bases containing hydroxyl groups. X-ray structure of CH2{cyclo C6H10NH CH-(2-O-naphth)}2.H2O

“…hindrance. An interesting variation of 13 C NMR resonances for the carbons involved in the pseudoaromatic six-membered ring in Scheme 2 is presented in The potential energy barrier between the keto and enol form varies with the solvent polarity [4]. Hence, it is expected that the keto form is more dominant than the enol form in a polar solvent.…”

“…The great importance of Schiff base compounds is due to their wide range of industrial applications and biological activities. They possess pharmacological activities such as antimicrobial, antifungal, anticancer, antiviral, anti-inflammatory, antiparasitic, antioxidant and more in industrial and auricular chemistry [1][2][3][4]. They also act as a basis for the synthesis of numerous organic compounds [5].…”