Photochemical isomerization of perfluoroindene to perfluoroisoindene. A sigmatropic migration of fluorine
Abstract
Perfluoroindene (I), when irradiated in the vapour phase, isomerizes via a sigmatropic fluorine shift to perfluoroisoindene which can be trapped as its Diels–Alder adduct with ethylene; the thermal reaction between (I) and ethylene gives the 1,2-adduct.