Question: (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

(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). HC CH3 CH3 vitamin E radical + R HC CH CH3 + RH

Using the fishhook notation, give a mechanism for this reaction. HC CH3 CH3 radical from vitamin E + HO. HO H H HO: vitamin C (ascorbic acid) OH H H3C CH3 CH3 vitamin E + HO

HC CH3 CH3 vitamin E radical + R HC CH CH3 + RH

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H3C a CH3 b CH3 H3C CH3 CH3 H3C CH3 CH3 CH3 You can use the second resonance structure shown in part a to react with the radical R R H3C H3C CH3 CH3 H3C CH ... View full answer

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