(a)
Interpretation:
For each of the given reactions, the product should be determined.
Concept introduction:
Sigmatropic rearrangement reaction is a pericyclic reaction of polyenes (π-system), in which one σ-bond is formed and another σ-bond is broken and remaining π-bonds are shifting their positions. Thereby the transition state is cyclic. The mechanism of rearrangement is represented by using curved arrows.
(b)
Interpretation:
For each of the given reactions, the product should be determined.
Concept introduction:
Sigmatropic rearrangement reaction is a pericyclic reaction of polyenes (π-system), in which one σ-bond is formed and another σ-bond is broken and remaining π-bonds are shifting their positions. Thereby the transition state is cyclic. The mechanism of rearrangement is represented by using curved arrows.
(c)
Interpretation:
For each of the given reactions, the product should be determined.
Concept introduction:
Sigmatropic rearrangement reaction is a pericyclic reaction of polyenes (π-system), in which one σ-bond is formed and another σ-bond is broken and remaining π-bonds are shifting their positions. Thereby the transition state is cyclic. The mechanism of rearrangement is represented by using curved arrows.
(d)
Interpretation:
For each of the given reactions, the product should be determined.
Concept introduction:
Sigmatropic rearrangement reaction is a pericyclic reaction of polyenes (π-system), in which one σ-bond is formed and another σ-bond is broken and remaining π-bonds are shifting their positions. Thereby the transition state is cyclic. The mechanism of rearrangement is represented by using curved arrows.
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