(a) Using the fishhook notation, derive the important resonance structures of the vitamin C-derived radical in Eq. 18.81b.

(b) In the laboratory, the radical derived from vitamin E can react with a second free radical R? to give the following oxidation product (among others).

Using the fishhook notation, give a mechanism for this reaction.

Transcribed Image Text:

H₂C CH3 CH3 vitamin E radical + R H₂C CH₂ CH3 + RH