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Deuterium isotope effect on ^13^C chemical shifts of tetrabutylammonium salts of Schiff bases amino acids by Z. Rozwadowski is a Chemistry article available to read on EtoBox.
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## Abstract Deuterium isotope effects on ^13^C chemical shift of tetrabutylammonium salts of Schiff bases, derivatives of amino acids (glycine, L‐alanine, L‐phenylalanine, L‐valine, L‐leucine, L‐isoleucine and L‐methionine) and various ortho‐hydroxyaldehydes in CDCl~3~ have been measured. The results have shown that the tetrabutylammonium salts of the Schiff bases amino acids, being derivatives of 2‐hydroxynaphthaldehyde and 3,5‐dibromosalicylaldehyde, exist in the NH‐form, while in the derivatives of salicylaldehyde and 5‐bromosalicylaldehyde a proton transfer takes place. The interactions between COO^−^ and NH groups stabilize the proton‐transferred form through a bifurcated intramolecular hydrogen bond. Copyright © 2006 John Wiley & Sons, Ltd.
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- Author
- Z. Rozwadowski
- Publisher
- John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; John Wiley and Sons Ltd; Wiley (ISSN 0749-1581)
- Published
- 2006
- Language
- EN
- Field
- Chemistry (Physical Sciences)