In which of the following does the hyperconju | vedclass

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(B) Hyperconjugation involves the delocalization of $\sigma$-electrons of a $C-H$ bond attached to an $\alpha$-carbon (a carbon atom adjacent to an un

Vedclass · Accepted Answer

$CH_3-CH=CH-CH_2^+$

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(B) Hyperconjugation involves the delocalization of $\sigma$-electrons of a $C-H$ bond attached to an $\alpha$-carbon (a carbon atom adjacent to an unsaturated system like a carbocation or a double bond) into an adjacent empty $p$-orbital.In option $B$, $CH_3-CH=CH-CH_2^+$, the carbocation is at the terminal position. The carbon adjacent to the carbocation is $CH$. However, the $CH_3$ group is attached to the $CH$ group which is part of the double bond. This structure allows for the delocalization of electrons through the conjugated system.More importantly, in $CH_3-CH=CH-CH_2^+$, the $CH_3$ group is attached to an $sp^2$ hybridized carbon. The $\alpha$-hydrogens on the $CH_3$ group can participate in hyperconjugation with the adjacent $\pi$-system, which in turn stabilizes the carbocation through resonance.Thus, hyperconjugation operates in $CH_3-CH=CH-CH_2^+$.Therefore, the correct answer is $B$.

In which of the following does the hyperconjugation effect operate?

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