Syntheses and Structural Studies of Schiff Bases Involving Hydrogen Bonds

Molecules

关键词: Schiff bases;    Tautomerism;    Hydrogen bonds;    NMR spectroscopy;    Density functional calculations.;   

DOI  :  10.3390/11060453

来源: DOAJ

【 摘 要 】

New Schiff bases have been prepared by reacting 3-hydroxy-4-pyridine- carboxaldehyde with various amines. NMR spectroscopic methods provided clear evidence that the Schiff bases exist in the solid state and in solution as hydroxyimino tautomers with the E-configuration. A study of the stabilities of the tautomeric forms and the different conformers has been carried out using density functional calculations at the B3LYP/6-31G** level.

【 授权许可】

Unknown