The given compounds has to be prepared from methyl phenyl ketone . Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens. If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

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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 18.14, Problem 30P

(a)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

(b)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

(c)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

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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 18.14, Problem 30P

(a)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

(b)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

(c)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

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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 18.14, Problem 30P

(a)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

(b)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

(c)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

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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 18.14, Problem 30P

(a)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

(b)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

(c)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

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Answer 5

Chapter 18.14, Problem 30P

(a)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

(b)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

(c)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

Answer 6

Chapter 18.14, Problem 30P

(a)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

Answer 7

Chapter 18.14, Problem 30P

(a)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

Answer 8

(b)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

Answer 9

(b)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

Answer 10

(c)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

Answer 11

(c)

Interpretation Introduction

Interpretation: The given compounds has to be prepared from methyl phenyl ketone.

Concept introduction: A crossed-claisen condensation is also a condensation reaction between a ketone and an ester. Primarily one product will form from crossed-claisen condensation when one of the ketone or easter do not have any alpha hydrogens.

If both ester and ketone have alpha hydrogens then primarily one product can form if LDA is used to remove alpha hydrogen to form the enolate ion. The other compound is added slowly to the enolate ion.

Answer 12

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Answer 13

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Answer 14

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Answer 15

Ch. 18.1 - Prob. 1P Ch. 18.1 - Prob. 2P Ch. 18.1 - Prob. 3P Ch. 18.1 - Prob. 4P Ch. 18.1 - PROBLEM 5♦ List the compounds in each of the...Ch. 18.2 - Explain why 92% of 2,4-pemtanedione exists as the...Ch. 18.3 - Draw the enol tautomers for each of the following...Ch. 18.3 - Prob. 8P Ch. 18.4 - Prob. 9P Ch. 18.4 - Prob. 10P

Solution Summary: The author explains that cross-claisen condensation is a condensation reaction between the ketone or easter and an ester.

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Chapter 18 Solutions