Syntheses and Structural Studies of New Molecules Involving Hydrogen Bonds

Almudena Perona; Dionisia Sanza; Rosa Claramunta; José Elguero

doi:10.3390/ecsoc-9-01472

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Syntheses and Structural Studies of New Molecules Involving Hydrogen Bonds

Almudena Perona

^{*

1},

Dionisia Sanza

^{*

1},

Rosa M. Claramunta

¹,

José Elguero

¹ Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Senda del Rey 9, E-28040 Madrid, Spain
² Instituto de Química Médica(CSIC), Centro de Química Orgánica 'Manuel Lora Tamayo', Juan de la Cierva 3, E-28006 Madrid, Spain

Published: 01 November 2005 by MDPI in The 9th International Electronic Conference on Synthetic Organic Chemistry session General Organic Synthesis

https://doi.org/10.3390/ecsoc-9-01472

Abstract: New Schiff bases have been prepared by reacting 3-hydroxy-4-pyridinecarboxaldehyde with several amines. NMR spectroscopic methods provided clear evidence that the Schiff bases exist in the solid state and in solution as hydroxy/imino tautomers. The study of the stabilities of the tautomeric forms and the different conformers have been approached using density functional calculations (B3LYP/6-31G**).

Keywords: Schiff bases; tautomerism; hydrogen bonds; NMR spectroscopy; density functional calculations

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Almudena Perona

Dionisia Sanza

Rosa Claramunta

José Elguero