Electron spin resonance spectra of free radicals. Part 3. 2,2-Disubstituted 1,3-dioxolan-4-yl radicals

Abstract

E.s.r. parameters are reported for 11 1,3-dioxolan-4-yl radicals each with two substituents at the 2-position. When the two substituents are different, the β-protons appear non-equivaient, and for some of the radicals selective broadening of the lines with M= 0 for the β-protons is observed. The implications of these observations are discussed. Some of the radicals show long-range splittings due to fluorine nuclei. These splittings are discussed in relation to splittings calculated for selected conformations by the INDO MO method.