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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 31, Number 4
BKCSDE 31(4)
April 20, 2010

Title	Experimental and Theoretical Investigations of Spectral, Tautomerism and Acid-Base Properties of Schiff Bases Derived from Some Amino Acids
Author	Y H Ebead*, H M A Salman, M A Abdellah
Keywords	Schiff bases, Tautomerism, DFT and PM6 calculations, pK_a values and UV-vis spectra
Abstract	The electronic absorption spectra of five Schiff bases derived from 2-hydroxy-1-naphthaldehyde with glycine, alanine, leucine, valine and phenylalanine have been measured in various solvents. The observed bands were assigned to the proper electronic transitions and compared with the predicted transitions at the semiempirical level of theory. The calculated equilibrium constants are in agreement with the experimental results, predicting the existence of all studied compounds predominantly or completely in keto-imine tautomerism. On the other hand, a correlation between 館 (cm^?1) (main frequency of each compound) and the well known solvent parameters E_T (30), 琯r,
Page	850 - 858
Full Text	PDF / Supporting Information

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