The kind of sigmatropic rearrangement that occurs in each of the given reactions has to be given. 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. There are mainly three types of pericyclic reactions, 1) Electrocyclic reactions 2) Cycloaddition reactions 3) Sigmatropic reactions In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.” Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

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Answer 1

Question

Chapter 28.5, Problem 12P

(a)

Interpretation Introduction

Interpretation: The kind of sigmatropic rearrangement that occurs in each of the given reactions has to be given.

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.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

(b)

Interpretation Introduction

Interpretation: Using arrows the electron rearrangement takes place in the given reactions has to be shown.

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.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

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Students have asked these similar questions

Name the kind of sigmatropic rearrangement that occurs in each of the following reactions. a. Using arrows, show the electron rearrangement that takes place in each reaction.

1. Which among these would be the most stable carbocation?a. Allylicb. Vinylicc. Primaryd. Secondary2. What is the primary reason for the stability of tertiary carbocations?a. Free rotationb. Resonancec. Hyperconjugation

What other alkene is also formed along with Y in Sample Problem 9.3 (Attached) ? What alkenes would form from X if no carbocation rearrangement occurred?

Answer 2

Question

Chapter 28.5, Problem 12P

(a)

Interpretation Introduction

Interpretation: The kind of sigmatropic rearrangement that occurs in each of the given reactions has to be given.

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.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

(b)

Interpretation Introduction

Interpretation: Using arrows the electron rearrangement takes place in the given reactions has to be shown.

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.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

Expert Solution & Answer

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Answer 3

Question

Chapter 28.5, Problem 12P

(a)

Interpretation Introduction

Interpretation: The kind of sigmatropic rearrangement that occurs in each of the given reactions has to be given.

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.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

(b)

Interpretation Introduction

Interpretation: Using arrows the electron rearrangement takes place in the given reactions has to be shown.

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.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

Expert Solution & Answer

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Check out a sample textbook solution

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Answer 4

Question

Chapter 28.5, Problem 12P

(a)

Interpretation Introduction

Interpretation: The kind of sigmatropic rearrangement that occurs in each of the given reactions has to be given.

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.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

(b)

Interpretation Introduction

Interpretation: Using arrows the electron rearrangement takes place in the given reactions has to be shown.

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.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

Expert Solution & Answer

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Answer 5

Chapter 28.5, Problem 12P

(a)

Interpretation Introduction

Interpretation: The kind of sigmatropic rearrangement that occurs in each of the given reactions has to be given.

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.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

(b)

Interpretation Introduction

Interpretation: Using arrows the electron rearrangement takes place in the given reactions has to be shown.

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.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

Answer 6

Chapter 28.5, Problem 12P

(a)

Interpretation Introduction

Interpretation: The kind of sigmatropic rearrangement that occurs in each of the given reactions has to be given.

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.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

Answer 7

Chapter 28.5, Problem 12P

(a)

Interpretation Introduction

Interpretation: The kind of sigmatropic rearrangement that occurs in each of the given reactions has to be given.

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.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

Answer 8

(b)

Interpretation Introduction

Interpretation: Using arrows the electron rearrangement takes place in the given reactions has to be shown.

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.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

Answer 9

(b)

Interpretation Introduction

Interpretation: Using arrows the electron rearrangement takes place in the given reactions has to be shown.

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.

There are mainly three types of pericyclic reactions,

1) Electrocyclic reactions

2) Cycloaddition reactions

3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 28.1 - Prob. 1P Ch. 28.2 - Prob. 2P Ch. 28.2 - Prob. 3P Ch. 28.2 - Give a molecular orbital description for each of...Ch. 28.3 - Prob. 5P Ch. 28.3 - Prob. 6P Ch. 28.3 - Prob. 7P Ch. 28.3 - Prob. 8P Ch. 28.4 - Prob. 10P Ch. 28.4 - Prob. 11P

Solution Summary: The author explains the sigmatropic rearrangement that occurs in each of the given reactions.

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Chapter 28 Solutions