Hyperconjugation is not observed in

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(D) Hyperconjugation requires the presence of at least one $\alpha-H$ atom on a carbon atom adjacent to a double bond or a carbocation.$A) \ CH_3-CH=C

Vedclass · Accepted Answer

$CH_2=CH_2$

Vedclass · Answer

(D) Hyperconjugation requires the presence of at least one $\alpha-H$ atom on a carbon atom adjacent to a double bond or a carbocation.$A) \ CH_3-CH=CH_2$: Has $3 \ \alpha-H$ atoms.$B) \ CH_3-C(CH_3)=C(CH_3)-CH_3$: Has $12 \ \alpha-H$ atoms.$C) \ (CH_3)_3C^+$: Has $9 \ \alpha-H$ atoms.$D) \ CH_2=CH_2$: Has $0 \ \alpha-H$ atoms.Since $CH_2=CH_2$ has no $\alpha-H$ atoms,hyperconjugation is not observed.

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