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(a)
Interpretation:
The product formed in the given reaction has to be drawn.
Concept introduction:
Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.
In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”
Sigmatropic rearrangement reactions are designated with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.
Migration of carbon and hydrogen will occur in a sigmatropic rearrangement reaction.
(b)
Interpretation:
The product formed in the given reaction has to be drawn.
Concept introduction:
Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.
In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”
Sigmatropic rearrangement reactions are designated with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.
Migration of carbon and hydrogen will occur in a sigmatropic rearrangement reaction.
(c)
Interpretation:
The product formed in the given reaction has to be drawn.
Concept introduction:
Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.
In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”
Sigmatropic rearrangement reactions are designated with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.
Migration of carbon and hydrogen will occur in a sigmatropic rearrangement reaction.
(d)
Interpretation:
The product formed in the given reaction has to be drawn.
Concept introduction:
Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.
In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”
Sigmatropic rearrangement reactions are designated with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.
Migration of carbon and hydrogen will occur in a sigmatropic rearrangement reaction.
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Chapter 28 Solutions
Pearson eText Organic Chemistry -- Instant Access (Pearson+)
- Predict the stereochemical outcome of the following E2 reaction: CI CIarrow_forwardElimination, stereochemical aspects. Draw the major product that is obtained when (2R,3R)-2-Bromo-3-phenylbutane is treated with sodium ethoxide and explain the stereochemical outcome of the reaction using Newman projections.arrow_forwardDraw the product of the following reaction(s) and explain the regiochemistry:arrow_forward
- 9. Draw the product(s) of the following intramolecular reaction and indicate stereochemistry when relevant. Lum LIH intramolecular SN1arrow_forwardWhat is the major product fromed from the reaction below?arrow_forwardSN1 reactions undergo carbocation rearrangements, but E1 reactions do not because the carbocation intermediate does not last as long during the elimination process. True O Falsearrow_forward
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