Q51 · CSIR-NET Chemistry, June 2016
Paper: CSIR-NET June 2016 · Subject: Organic Chemistry · Chapter: Pericyclic Reactions · Topic: Frontier Orbital Analysis · Marks: 2 · Difficulty: Medium
The frontier orbital interactions involved in the formation of the carbocation intermediate in the reaction of isobutylene with HCl are
(a)$\pi$ of olefin and $\sigma^{*}$ of HCl
(b)$\pi$ of olefin and $\sigma$ of HCl
(c)$\pi^{*}$ of olefin and $\sigma^{*}$ of HCl
(d)$\pi^{*}$ of olefin and $\sigma$ of HCl
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
Protonation of the alkene is the interaction of the alkene HOMO (π) with the H–Cl LUMO (σ*).
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