Résumé : The following reactions have been studied kinetically: 1. Solvolysis of 1‐, 3‐ and 8‐chloromethylfluoranthene with (a) water 20,5%‐dioxane 79,5%, (b) water 6,1%‐dioxane 39,8%‐formic acid 54,1%. Copyright © 1960 Verlag GmbH & Co. KGaA, Weinheim