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Exercise: Stability of radicals 2


Similar to carbocations, radicals usually appear only during stages. However, in comparison to carbocations, carbon-centered radicals normally exhibit a longer half-life period. The stability of radicals - as in case of carbocations - depends on their . Higherly substituted radicals are more than lower substituted ones. The stability of radicals can be determined by the energies of the C-H bonds that must be homolytically cleaved in order to obtain the radicals. The comparison of radical stabilities yields the following sequence: allylic, benzylic > > > > methyl.

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