(a) Interpretation: The given incomplete reaction is to be completed. Concept introduction: Claisen condensation takes place between two esters or between an ester and a ketone . In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with the carbonyl group of other carbonyl compounds that lead to the formation of β - ketoester.

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Answer 1

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Definition Definition Organic compounds that have a carbonyl group, C = O, as their functional group. The carbonyl group in ketones is placed somewhere in the middle of the molecular structure, which means, the C=O is attached to two alkyl groups or benzene rings. Just like all other homologous series, the naming of ketones is done using a common suffix “-one”. The general molecular formula is C n H 2n O. Functional group of a ketone

Chapter 28, Problem 28.20P

Interpretation Introduction

(a)

Interpretation:

The given incomplete reaction is to be completed.

Concept introduction:

Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with the carbonyl group of other carbonyl compounds that lead to the formation of β- ketoester.

Interpretation Introduction

(b)

Interpretation:

The starting material that gives the compound in an aliphatic Claisen rearrangement is to be stated.

Concept introduction:

Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with the carbonyl group of other carbonyl compounds that lead to the formation of β- ketoester.

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Answer 2

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Definition Definition Organic compounds that have a carbonyl group, C = O, as their functional group. The carbonyl group in ketones is placed somewhere in the middle of the molecular structure, which means, the C=O is attached to two alkyl groups or benzene rings. Just like all other homologous series, the naming of ketones is done using a common suffix “-one”. The general molecular formula is C n H 2n O. Functional group of a ketone

Chapter 28, Problem 28.20P

Interpretation Introduction

(a)

Interpretation:

The given incomplete reaction is to be completed.

Concept introduction:

Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with the carbonyl group of other carbonyl compounds that lead to the formation of β- ketoester.

Interpretation Introduction

(b)

Interpretation:

The starting material that gives the compound in an aliphatic Claisen rearrangement is to be stated.

Concept introduction:

Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with the carbonyl group of other carbonyl compounds that lead to the formation of β- ketoester.

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Answer 3

Question

Definition Definition Organic compounds that have a carbonyl group, C = O, as their functional group. The carbonyl group in ketones is placed somewhere in the middle of the molecular structure, which means, the C=O is attached to two alkyl groups or benzene rings. Just like all other homologous series, the naming of ketones is done using a common suffix “-one”. The general molecular formula is C n H 2n O. Functional group of a ketone

Chapter 28, Problem 28.20P

Interpretation Introduction

(a)

Interpretation:

The given incomplete reaction is to be completed.

Concept introduction:

Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with the carbonyl group of other carbonyl compounds that lead to the formation of β- ketoester.

Interpretation Introduction

(b)

Interpretation:

The starting material that gives the compound in an aliphatic Claisen rearrangement is to be stated.

Concept introduction:

Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with the carbonyl group of other carbonyl compounds that lead to the formation of β- ketoester.

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Answer 4

Question

Definition Definition Organic compounds that have a carbonyl group, C = O, as their functional group. The carbonyl group in ketones is placed somewhere in the middle of the molecular structure, which means, the C=O is attached to two alkyl groups or benzene rings. Just like all other homologous series, the naming of ketones is done using a common suffix “-one”. The general molecular formula is C n H 2n O. Functional group of a ketone

Chapter 28, Problem 28.20P

Interpretation Introduction

(a)

Interpretation:

The given incomplete reaction is to be completed.

Concept introduction:

Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with the carbonyl group of other carbonyl compounds that lead to the formation of β- ketoester.

Interpretation Introduction

(b)

Interpretation:

The starting material that gives the compound in an aliphatic Claisen rearrangement is to be stated.

Concept introduction:

Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with the carbonyl group of other carbonyl compounds that lead to the formation of β- ketoester.

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Answer 5

Chapter 28, Problem 28.20P

Interpretation Introduction

(a)

Interpretation:

The given incomplete reaction is to be completed.

Concept introduction:

Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with the carbonyl group of other carbonyl compounds that lead to the formation of β- ketoester.

Interpretation Introduction

(b)

Interpretation:

The starting material that gives the compound in an aliphatic Claisen rearrangement is to be stated.

Concept introduction:

Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with the carbonyl group of other carbonyl compounds that lead to the formation of β- ketoester.

Answer 6

Chapter 28, Problem 28.20P

Interpretation Introduction

(a)

Interpretation:

The given incomplete reaction is to be completed.

Concept introduction:

Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with the carbonyl group of other carbonyl compounds that lead to the formation of β- ketoester.

Answer 7

Chapter 28, Problem 28.20P

Interpretation Introduction

(a)

Interpretation:

The given incomplete reaction is to be completed.

Concept introduction:

Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with the carbonyl group of other carbonyl compounds that lead to the formation of β- ketoester.

Answer 8

Interpretation Introduction

(b)

Interpretation:

The starting material that gives the compound in an aliphatic Claisen rearrangement is to be stated.

Concept introduction:

Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with the carbonyl group of other carbonyl compounds that lead to the formation of β- ketoester.

Answer 9

Interpretation Introduction

(b)

Interpretation:

The starting material that gives the compound in an aliphatic Claisen rearrangement is to be stated.

Concept introduction:

Claisen condensation takes place between two esters or between an ester and a ketone. In crossed Claisen condensation reaction, a base abstracts an acidic proton from an α carbon atom of carbonyl compound to form an enolate. This enolate reacts with the carbonyl group of other carbonyl compounds that lead to the formation of β- ketoester.

Answer 10

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Answer 12

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Answer 13

Ch. 28 - Prob. 28.1P Ch. 28 - Prob. 28.2P Ch. 28 - Prob. 28.3P Ch. 28 - Prob. 28.4P Ch. 28 - Prob. 28.5P Ch. 28 - Prob. 28.6P Ch. 28 - Prob. 28.7P Ch. 28 - Prob. 28.8P Ch. 28 - Prob. 28.9P Ch. 28 - Prob. 28.10P

Solution Summary: The author explains that a base abstracts an acidic proton from an carbon atom of carbonyl compound to form an enolate.

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Chapter 28 Solutions