The preparation of the given α,β -unsaturated aldehyde by an aldol condensation followed by dehydration of the aldol product has to be shown. Concept introduction: Aldol reaction is an addition reaction of aldehydes and ketones . Aldol reaction is a reversible reaction and occurs in the presence of a strong base like sodium hydroxide. One molecule (aldehyde or ketone) acts a nucleophile and attacks the electrophilic carbon center of the other molecule to give the addition product. The product is named β -hydroxy aldehyde if two aldehydes combine and β -hydroxy ketone if two ketones combine.

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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 aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 19, Problem 19.22P

(a)

Interpretation Introduction

Interpretation:

The preparation of the given α,β-unsaturated aldehyde by an aldol condensation followed by dehydration of the aldol product has to be shown.

Concept introduction:

Aldol reaction is an addition reaction of aldehydes and ketones. Aldol reaction is a reversible reaction and occurs in the presence of a strong base like sodium hydroxide. One molecule (aldehyde or ketone) acts a nucleophile and attacks the electrophilic carbon center of the other molecule to give the addition product. The product is named β-hydroxy aldehyde if two aldehydes combine and β-hydroxy ketone if two ketones combine.

(b)

Interpretation Introduction

Interpretation:

The preparation of the given α,β-unsaturated aldehyde by an aldol condensation followed by dehydration of the aldol product has to be shown.

Concept introduction:

Aldol reaction is an addition reaction of aldehydes and ketones. Aldol reaction is a reversible reaction and occurs in the presence of a strong base like sodium hydroxide. One molecule (aldehyde or ketone) acts a nucleophile and attacks the electrophilic carbon center of the other molecule to give the addition product. The product is named β-hydroxy aldehyde if two aldehydes combine and β-hydroxy ketone if two ketones combine.

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Convert the structure below to a skeletal drawing. H C 010 H. I C 010 C=O C H C. H

Answer 2

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 19, Problem 19.22P

(a)

Interpretation Introduction

Interpretation:

The preparation of the given α,β-unsaturated aldehyde by an aldol condensation followed by dehydration of the aldol product has to be shown.

Concept introduction:

Aldol reaction is an addition reaction of aldehydes and ketones. Aldol reaction is a reversible reaction and occurs in the presence of a strong base like sodium hydroxide. One molecule (aldehyde or ketone) acts a nucleophile and attacks the electrophilic carbon center of the other molecule to give the addition product. The product is named β-hydroxy aldehyde if two aldehydes combine and β-hydroxy ketone if two ketones combine.

(b)

Interpretation Introduction

Interpretation:

The preparation of the given α,β-unsaturated aldehyde by an aldol condensation followed by dehydration of the aldol product has to be shown.

Concept introduction:

Aldol reaction is an addition reaction of aldehydes and ketones. Aldol reaction is a reversible reaction and occurs in the presence of a strong base like sodium hydroxide. One molecule (aldehyde or ketone) acts a nucleophile and attacks the electrophilic carbon center of the other molecule to give the addition product. The product is named β-hydroxy aldehyde if two aldehydes combine and β-hydroxy ketone if two ketones combine.

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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 aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 19, Problem 19.22P

(a)

Interpretation Introduction

Interpretation:

The preparation of the given α,β-unsaturated aldehyde by an aldol condensation followed by dehydration of the aldol product has to be shown.

Concept introduction:

Aldol reaction is an addition reaction of aldehydes and ketones. Aldol reaction is a reversible reaction and occurs in the presence of a strong base like sodium hydroxide. One molecule (aldehyde or ketone) acts a nucleophile and attacks the electrophilic carbon center of the other molecule to give the addition product. The product is named β-hydroxy aldehyde if two aldehydes combine and β-hydroxy ketone if two ketones combine.

(b)

Interpretation Introduction

Interpretation:

The preparation of the given α,β-unsaturated aldehyde by an aldol condensation followed by dehydration of the aldol product has to be shown.

Concept introduction:

Aldol reaction is an addition reaction of aldehydes and ketones. Aldol reaction is a reversible reaction and occurs in the presence of a strong base like sodium hydroxide. One molecule (aldehyde or ketone) acts a nucleophile and attacks the electrophilic carbon center of the other molecule to give the addition product. The product is named β-hydroxy aldehyde if two aldehydes combine and β-hydroxy ketone if two ketones combine.

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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 aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 19, Problem 19.22P

(a)

Interpretation Introduction