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MDPI, Molecules, 6(11), p. 453-463, 2006

DOI: 10.3390/11060453

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Syntheses and Structural Studies of Schiff Bases Involving Hydrogen Bonds

Journal article published in 2006 by Almudena Perona, Dionisia Sanz ORCID, Rosa M. Claramunt, José Elguero
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

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.