Electron spin resonance spectra of free radicals. Part 2. Radicals formed by hydrogen abstraction from cyclic and acyclic fluoro-acetals

Free radicals formed during the photolysis of solutions containing di-t-butyl peroxide and fluoro-acetals such as 1,1-diethoxy-2-fluoroethane and substituted 1,3-dioxolanes, have been studied by e.s.r. Spectroscopy. Only the radicals formed initially by hydrogen abstraction were detected, although product analysis by g.c.–m.s. Indicated that certain of the cyclic radicals rearranged to acyclic species. The e.s.r. Parameters are discussed in relation to the preferred conformations of the radicals.