The product of the claisen condensation of ethyl phenylacetate in the presence of sodium ethoxide ion has to be shown. Concept introduction: When two molecules of an ester undergo condensation, then it is called claisen condensation. Like in aldol reaction, in claisen condensation one molecule is a nucleophile and the other molecule is an electrophile. A claisen condensation reaction is a reversible reaction and occurs in the presence of a strong base. The first step of claisen condensation is the removal of a proton from alpha carbon by a base and then the addition of enolate ion formed to the second ester molecule forming a β-ketoester.

Question

Viscosity of a liquid related to the activation energy.

Answer 1

Question

Chapter 19, Problem 19.29P

(a)

Interpretation Introduction

Interpretation:

The product of the claisen condensation of ethyl phenylacetate in the presence of sodium ethoxide ion has to be shown.

Concept introduction:

When two molecules of an ester undergo condensation, then it is called claisen condensation. Like in aldol reaction, in claisen condensation one molecule is a nucleophile and the other molecule is an electrophile.

A claisen condensation reaction is a reversible reaction and occurs in the presence of a strong base.

The first step of claisen condensation is the removal of a proton from alpha carbon by a base and then the addition of enolate ion formed to the second ester molecule forming a β-ketoester.

(b)

Interpretation Introduction

Interpretation:

The product of the claisen condensation of methyl hexanoate in the preesnce of sodium ethoxide ion has to be shown.

Concept introduction:

When two molecules of an ester undergo condensation, then it is called claisen condensation. Like in aldol reaction, in claisen condensation one molecule is a nucleophile and the other molecule is an electrophile.

A claisen condensation reaction is a reversible reaction and occurs in the presence of a strong base.

The first step of claisen condensation is the removal of a proton from alpha carbon by a base and then the addition of enolate ion formed to the second ester molecule forming a β-ketoester.

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Answer 2

Question

Chapter 19, Problem 19.29P

(a)

Interpretation Introduction

Interpretation:

The product of the claisen condensation of ethyl phenylacetate in the presence of sodium ethoxide ion has to be shown.

Concept introduction:

When two molecules of an ester undergo condensation, then it is called claisen condensation. Like in aldol reaction, in claisen condensation one molecule is a nucleophile and the other molecule is an electrophile.

A claisen condensation reaction is a reversible reaction and occurs in the presence of a strong base.

The first step of claisen condensation is the removal of a proton from alpha carbon by a base and then the addition of enolate ion formed to the second ester molecule forming a β-ketoester.

(b)

Interpretation Introduction

Interpretation:

The product of the claisen condensation of methyl hexanoate in the preesnce of sodium ethoxide ion has to be shown.

Concept introduction:

When two molecules of an ester undergo condensation, then it is called claisen condensation. Like in aldol reaction, in claisen condensation one molecule is a nucleophile and the other molecule is an electrophile.

A claisen condensation reaction is a reversible reaction and occurs in the presence of a strong base.

The first step of claisen condensation is the removal of a proton from alpha carbon by a base and then the addition of enolate ion formed to the second ester molecule forming a β-ketoester.

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Answer 3

Question

Chapter 19, Problem 19.29P

(a)

Interpretation Introduction

Interpretation:

The product of the claisen condensation of ethyl phenylacetate in the presence of sodium ethoxide ion has to be shown.

Concept introduction:

When two molecules of an ester undergo condensation, then it is called claisen condensation. Like in aldol reaction, in claisen condensation one molecule is a nucleophile and the other molecule is an electrophile.

A claisen condensation reaction is a reversible reaction and occurs in the presence of a strong base.

The first step of claisen condensation is the removal of a proton from alpha carbon by a base and then the addition of enolate ion formed to the second ester molecule forming a β-ketoester.

(b)

Interpretation Introduction

Interpretation:

The product of the claisen condensation of methyl hexanoate in the preesnce of sodium ethoxide ion has to be shown.

Concept introduction:

When two molecules of an ester undergo condensation, then it is called claisen condensation. Like in aldol reaction, in claisen condensation one molecule is a nucleophile and the other molecule is an electrophile.

A claisen condensation reaction is a reversible reaction and occurs in the presence of a strong base.

The first step of claisen condensation is the removal of a proton from alpha carbon by a base and then the addition of enolate ion formed to the second ester molecule forming a β-ketoester.

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Answer 4

Question

Chapter 19, Problem 19.29P

(a)

Interpretation Introduction

Interpretation:

The product of the claisen condensation of ethyl phenylacetate in the presence of sodium ethoxide ion has to be shown.

Concept introduction:

When two molecules of an ester undergo condensation, then it is called claisen condensation. Like in aldol reaction, in claisen condensation one molecule is a nucleophile and the other molecule is an electrophile.

A claisen condensation reaction is a reversible reaction and occurs in the presence of a strong base.

The first step of claisen condensation is the removal of a proton from alpha carbon by a base and then the addition of enolate ion formed to the second ester molecule forming a β-ketoester.

(b)

Interpretation Introduction

Interpretation:

The product of the claisen condensation of methyl hexanoate in the preesnce of sodium ethoxide ion has to be shown.

Concept introduction:

When two molecules of an ester undergo condensation, then it is called claisen condensation. Like in aldol reaction, in claisen condensation one molecule is a nucleophile and the other molecule is an electrophile.

A claisen condensation reaction is a reversible reaction and occurs in the presence of a strong base.

The first step of claisen condensation is the removal of a proton from alpha carbon by a base and then the addition of enolate ion formed to the second ester molecule forming a β-ketoester.

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Answer 5

Chapter 19, Problem 19.29P

(a)

Interpretation Introduction

Interpretation:

The product of the claisen condensation of ethyl phenylacetate in the presence of sodium ethoxide ion has to be shown.

Concept introduction:

When two molecules of an ester undergo condensation, then it is called claisen condensation. Like in aldol reaction, in claisen condensation one molecule is a nucleophile and the other molecule is an electrophile.

A claisen condensation reaction is a reversible reaction and occurs in the presence of a strong base.

The first step of claisen condensation is the removal of a proton from alpha carbon by a base and then the addition of enolate ion formed to the second ester molecule forming a β-ketoester.

(b)

Interpretation Introduction

Interpretation:

The product of the claisen condensation of methyl hexanoate in the preesnce of sodium ethoxide ion has to be shown.

Concept introduction:

When two molecules of an ester undergo condensation, then it is called claisen condensation. Like in aldol reaction, in claisen condensation one molecule is a nucleophile and the other molecule is an electrophile.

A claisen condensation reaction is a reversible reaction and occurs in the presence of a strong base.

The first step of claisen condensation is the removal of a proton from alpha carbon by a base and then the addition of enolate ion formed to the second ester molecule forming a β-ketoester.

Answer 6

Chapter 19, Problem 19.29P

(a)

Interpretation Introduction

Interpretation:

The product of the claisen condensation of ethyl phenylacetate in the presence of sodium ethoxide ion has to be shown.

Concept introduction:

When two molecules of an ester undergo condensation, then it is called claisen condensation. Like in aldol reaction, in claisen condensation one molecule is a nucleophile and the other molecule is an electrophile.

A claisen condensation reaction is a reversible reaction and occurs in the presence of a strong base.

The first step of claisen condensation is the removal of a proton from alpha carbon by a base and then the addition of enolate ion formed to the second ester molecule forming a β-ketoester.

Answer 7

Chapter 19, Problem 19.29P

(a)

Interpretation Introduction

Interpretation:

The product of the claisen condensation of ethyl phenylacetate in the presence of sodium ethoxide ion has to be shown.

Concept introduction:

When two molecules of an ester undergo condensation, then it is called claisen condensation. Like in aldol reaction, in claisen condensation one molecule is a nucleophile and the other molecule is an electrophile.

A claisen condensation reaction is a reversible reaction and occurs in the presence of a strong base.

The first step of claisen condensation is the removal of a proton from alpha carbon by a base and then the addition of enolate ion formed to the second ester molecule forming a β-ketoester.

Answer 8

(b)

Interpretation Introduction

Interpretation:

The product of the claisen condensation of methyl hexanoate in the preesnce of sodium ethoxide ion has to be shown.

Concept introduction:

When two molecules of an ester undergo condensation, then it is called claisen condensation. Like in aldol reaction, in claisen condensation one molecule is a nucleophile and the other molecule is an electrophile.

A claisen condensation reaction is a reversible reaction and occurs in the presence of a strong base.

The first step of claisen condensation is the removal of a proton from alpha carbon by a base and then the addition of enolate ion formed to the second ester molecule forming a β-ketoester.

Answer 9

(b)

Interpretation Introduction

Interpretation:

The product of the claisen condensation of methyl hexanoate in the preesnce of sodium ethoxide ion has to be shown.

Concept introduction:

When two molecules of an ester undergo condensation, then it is called claisen condensation. Like in aldol reaction, in claisen condensation one molecule is a nucleophile and the other molecule is an electrophile.

A claisen condensation reaction is a reversible reaction and occurs in the presence of a strong base.

The first step of claisen condensation is the removal of a proton from alpha carbon by a base and then the addition of enolate ion formed to the second ester molecule forming a β-ketoester.

Answer 10

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Answer 21

Ch. 19.2 - Prob. 19.1P Ch. 19.2 - Prob. 19.2P Ch. 19.2 - Prob. 19.3P Ch. 19.3 - Prob. 19.4P Ch. 19.3 - Prob. 19.5P Ch. 19.3 - Prob. 19.6P Ch. 19.5 - Prob. 19.7P Ch. 19.5 - Prob. 19.8P Ch. 19.5 - Prob. 19.9P Ch. 19.6 - Prob. 19.10P

Solution Summary: The author describes the claisen condensation reaction of ethyl phenylacetate and methyl hexanoate.

Chapter 19 Solutions