Interpretation theorique de la reaction de diels-alder dans la serie des dienes fonctionnels dissymetriquement substitues-I : Structure electronique et reactivite |
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| Authors: | M Blain S Odiot GJ Martin JP Gouesnard O Chalvet |
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| Institution: | Service de Spectroscopie Moléculaire en Milieu Condensé Département de Recherches Physiques laboratoire associe au C.N.R. S. No. 71, Université Pierre et Marie Curie tour 224, place Jussieu, 75230 Paris Cedex 05, France;Laboratoire de Chimie Organique Physique, Equipe de Recherche associée au C.N.R.S. No. 315, U.E.R. de Chimie, 44072 Nantes, France;Centre de Mécanique Ondulatoire Appliquée, 23, rue du Maroc, 75019 Paris, France |
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| Abstract: | The chemical reactivity of two series of butadienes in Diels-Alder reactions is given. It shows a substitution dissymmetry dependent on the substitution sites (1 or 2) of the functional group (ethoxy) on the butadiene skeleton. The differences in the behaviour of the two series are shown by means of semi-empirical correlations between Log K and theoretical data derived from CNDO/S calculations within the frame of perturbation theory. Furthermore, the existence of an excellent correlation between Log K and electronic affinity for a series of ethylene dienophiles reacting with the ethoxy-1 butadiene is demonstrated. |
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