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JEE Advanced · Chemistry · 13. GOC

The hyperconjugative stabilities of tert-butyl cation and 2-butene, respectively, due to 

  1. A \(\sigma \rightarrow p\) (empty) and \(\sigma \rightarrow \pi^*\) electron delocalisations.
  2. B \(\sigma \rightarrow \sigma^*\) and \(\sigma \rightarrow \pi\) electron delocalisations.
  3. C \(\sigma \rightarrow p\) (filled) and \(\sigma \rightarrow \pi\) electron delocalisations.
  4. D p (filled) \(\rightarrow \sigma^*\) and \(\sigma \rightarrow \pi^*\) electron delocalisations.
Verified Solution

Answer & Solution

Correct Answer

(A) \(\sigma \rightarrow p\) (empty) and \(\sigma \rightarrow \pi^*\) electron delocalisations.

Step-by-step Solution

Detailed explanation


In tert-butyl cation, carbon bearing charge has one vacant p orbital hence it is σ - p (empty) conjugation or Hyperconjugation.

In 2-butene hyperconjugation between​ σ and π * bond.
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