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Order of stability of vinyl , allyl, ter...

Order of stability of vinyl , allyl, tertiary radicals is

A

tertiary, viinyl, allyl

B

vinyl, tertiary, allyl

C

tertiary, allyl, vinyl

D

allyl, teritary, vinyl

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The correct Answer is:
D
The stability of alkyl free radicals is not influenced by inductive effect because they have no charge (difference from carbonium and carbanions). So, they are stabilized by hyperconjugation (no bond resonance). The relative order of stability of common free radical.
triphenylmethylgtbenzylgtallylgttertgtsec.gtpri.ltmethylgtvinyl.
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