Paul Fierens

Etudes cinetiques des reactions de solvolyse de chlorures d'α-phenylethyle substitues. Equations de Hammett, Winstein-Grünwald et Tommila

Abstract The kinetic study of the solvolysis of m -CH 3 , p -CH 3 , m -OCH 3 , p -Cl, m -Cl and p -F substituted α-phenylethyl chlorides has been carried out in the following media: water 20·5%-dioxane 79·5% water 49·3%-dioxane 50·7% water 66·66%-dioxane 33·33% water 5·3%-dioxane 25·8%-formic acid 69·7% water 6·1%-dioxane 39·8%-formic acid 54·1% water 5·8%-dioxane 60·2%-formic acid 34·0% Correlation of solvolysis rates has been made with the equations of Hammett, Winstein-Grunwald and Tommila.

Études cinetiques dans le domaine des dérivés polycycliques aromatiques-V. Réactions de solvolyse de dérivés chlorométhylés d'hydrocarbures polycyliques aromatiques condensés

Resume The solvolyses in different media of six polycyclic aromatic chloromethyl derivatives have been followed conductometrically, according to a previously described method. Kinetic constants and Arrhenius parameters are given. The results are discussed in terms of mechanistic changes and solvation. It is shown that the equations proposed by Tommila and Dewar to correlate the S N 1 solvolysis rates lead to the same qualitative conclusions.