The Synthesis of a New Precursor for Perfluorinated Surfactants: The F-Hexylthiirane.-Starting with the fluorooctene (I), the thiirane (VIII) is obtained via the two pathways outlined in the reaction scheme. -(POPKOVA, V. YA.; GERMAN, L. S.; SZONYI, S.; CAMBON, A.; J. Fluorine Chem. 49 (1990) 2, 159-165; Lab. Chim. Org. Fluor, Univ., 06034 Nice, Fr.; FR)