The solvolysis of ally1 and propargyl chlorides have been carried out in the mixture: formic acid (93,6%)water (6,4%).The relative rates are interpreted in terms of a previously published qualitative general treatment (P. J. C. Fierens, J. Jaminet et P. Kruys, Bull. SOC. Chim. Belges 64, 557 (1955)) based on the competition between two main factors: inductive and mesomeric effects. * * * Kous exprimons notre gratitude a Monsieur le Professeur R. Id. Martin qui a suivi ce travail avec le plus vif intkr&t. (' ) P. J. c. FIERENS, A. IhI.I,EITx et €1. HANNAERT, B d l . S O C . Chim.Belg.. 64, 191 (195.5).
Etudes cinbtiques en sbrie alicyclique11. -Substitution nuclkophile bimolkeulaire rkversible , par les ions iodure, du hromurc de eyclooetyle ( l ) par P.J.C. FIERENS (*) et P . VERSCHELDEN (Rruscllcs) Xous nvons rendu conipte, rCceniiiient, des resultats de l'etude cinetique de la substitution nucleophile bimoleculaire reversible, par les ions iodure, des hornures de cyclobutyle, cyclopentyle, cyciohexple ct cycioheptyie (I). NOUS avons poursuivi no tre investigation en nous adressant au ternie suivant de cette skric homologuc alicyclique : lc bromure de cyclooctyle (2).Ida technique operatoire et le mode tle calcul son1 ceus signales nuparavant (I).Voici nos resultats :
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