Stable radicals are generated by oxidation of s-butyl-lithium with transition-metal ions ; the e.s.r. spectra of these radicals are discussed. THE oxidation of intermediate anions to radicals has been postulated in many oxidation reactions catalysed by metal ions.l Using a flow system, the e.s.r. spectrum has been obtained for the radical CH,*CH,-CO,Me, a rearranged oxidation product of the anion of l-methoxycyclopropanoL2 FIGURE. E.s.r. signaE of Bu*Li-DIPS.This heniiacetal is quantitatively oxidized by Ce4+, Cu2+, and Fe3+, ions; the process is catalytic as the oxygen
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