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Which of the free radicals is most stabl...

Which of the free radicals is most stable?

A

`CH_(3)overset(.)CH_(2)`

B

`CH_(2)=CH-CH_(2)`

C

`(CH_(3))_(2)CH`

D

`(CH_(3))_(3)C`

Text Solution

Verified by Experts

The correct Answer is:
B
Allyl free radical is resonance stabilized:

Alkyl radicals are stabilized via induction and hyperconjugation. Their stability decreases with the descrease in the number of alkyl groups. Thus the overall, order of stability is
`CH_(2)=CH-overset(*)CH_(2)gt(CH_(3))_(3)overset(*)(C) gt (CH_(3))_(2)overset(*)(C)H gt CH_(3)overset(*)(C)H_(2)`
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