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Advances in Chemistry
Volume 2014 (2014), Article ID 490358, 5 pages
Research Article

Structural Conformational Study of Eugenol Derivatives Using Semiempirical Methods

Department of Chemistry, Faculty of Sciences, University of Tlemcen, BP 119, 13000 Tlemcen, Algeria

Received 3 June 2014; Accepted 29 September 2014; Published 20 October 2014

Academic Editor: Maria Roca

Copyright © 2014 Radia Mahboub. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We investigated the conformational structure of eugenol and eugenyl acetate under torsional angle effect by performing semiempirical calculations using AM1 and PM3 methods. From these calculations, we have evaluated the strain energy of conformational interconversion. To provide a better estimate of stable conformations, we have plotted the strain energy versus dihedral angle. So, we have determined five geometries of eugenol (three energy minima and two transition states) and three geometries of eugenyl acetate (two energy minima and one transition state). From the molecular orbital calculations, we deduce that the optimized trans form by AM1 method is more reactive than under PM3 method. We can conclude that both methods are efficient. The AM1 method allows us to determine the reactivity and PM3 method to verify the stability.