Journal
JOURNAL OF MOLECULAR STRUCTURE
Volume 598, Issue 2-3, Pages 229-234Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0022-2860(01)00638-X
Keywords
Schiff bases; intramolecular proton transfer; deuterium isotope effect on N-15 NMR chemical shifts; electronic absorption spectra
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The solvent effect on tautomerism of Schiff bases has been studied by measuring the deuterium isotope effect on their N-15 NMR and UV-Vis spectra in different solvents. The interactions of the Schiff bases with solvent molecules are of local character and they vary for the series of solvents under study. The experimental results and PM3 calculations show that the solvent effect on the position of the proton transfer equilibrium depends on the electronic structure of particular Schiff bases. (C) 2001 Elsevier Science B.V. All rights reserved.
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