Question:
Arrange the following free radicals in the correct order of their stability:
Arrange the following free radicals in the correct order of their stability:
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Remember: More substituted carbon radicals (like tertiary) are more stable due to hyperconjugation and electron-donating alkyl groups.
Updated On: Mar 18, 2026
- CH\textsubscript{2} = CH• \quad (ii) CH\textsubscript{3}• \quad (iii) CH\textsubscript{3}–CH–CH\textsubscript{3}• \quad (iv) (CH\textsubscript{3})\textsubscript{3}C• }
- i > ii > iii > iv
- iv > iii > ii > i
- i < ii < iii < ivShow Solution
Verified By CollegeduniaThe Correct Option is B
Solution and Explanation
Free radical stability increases with the number of alkyl substituents due to hyperconjugation and inductive effects. Tertiary radicals like (CH\textsubscript{3})\textsubscript{3}C• are most stable, followed by secondary (CH\textsubscript{3}–CH–CH\textsubscript{3}•), primary (CH\textsubscript{3}•), and least stable are vinylic radicals like CH\textsubscript{2}=CH•.
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