JEE AdvancedHardQuestion 730014
Question
The stability of free radicals follows the order:
- A3° > 2° > 1° > CH₃Correct
- BCH₃ > 1° > 2° > 3°
- CAll equal
- DAllylic < alkyl
Correct answer
3° > 2° > 1° > CH₃
Explanation
Free radical stability parallels carbocation stability due to hyperconjugation: tertiary > secondary > primary > methyl. Additionally, allylic and benzylic radicals are more stable than even tertiary due to resonance.