In Section 15.5c, we learned that the frequency of a C=O stretch decreases when the C=O bond is conjugated to a C=C bond. The pertinent resonance contributor of a conjugated carbonyl ( C=C-C=O ) is to be drawn. Based on the resulting resonance hybrid, the reason for decrease in the frequency is to be explained. Concept introduction: When a C=O group is conjugated to a C=C bond, the frequency of the C=O absorption is typically lowered by 20–40 cm − 1 . The conjugation decreases the stiffness of the C=O bond. If the C=O bond is conjugated to a C=C bond, the resonance structure is possible. The C-O single bond is weaker than C=O bond. The C-O single bond character decreases the stiffness of C=O bond. The stretching frequency of C=O band lowers by the Weakening of C=O bond.

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Answer 1

Question

Chapter 15, Problem 15.46P

Interpretation Introduction

Interpretation:

In Section 15.5c, we learned that the frequency of a C=O stretch decreases when the C=O bond is conjugated to a C=C bond. The pertinent resonance contributor of a conjugated carbonyl (C=C-C=O) is to be drawn. Based on the resulting resonance hybrid, the reason for decrease in the frequency is to be explained.

Concept introduction:

When a C=O group is conjugated to a C=C bond, the frequency of the C=O absorption is typically lowered by 20–40 cm−1. The conjugation decreases the stiffness of the C=O bond. If the C=O bond is conjugated to a C=C bond, the resonance structure is possible. The C-O single bond is weaker than C=O bond. The C-O single bond character decreases the stiffness of C=O bond. The stretching frequency of C=O band lowers by the Weakening of C=O bond.

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Answer 2

Question

Chapter 15, Problem 15.46P

Interpretation Introduction

Interpretation:

In Section 15.5c, we learned that the frequency of a C=O stretch decreases when the C=O bond is conjugated to a C=C bond. The pertinent resonance contributor of a conjugated carbonyl (C=C-C=O) is to be drawn. Based on the resulting resonance hybrid, the reason for decrease in the frequency is to be explained.

Concept introduction:

When a C=O group is conjugated to a C=C bond, the frequency of the C=O absorption is typically lowered by 20–40 cm−1. The conjugation decreases the stiffness of the C=O bond. If the C=O bond is conjugated to a C=C bond, the resonance structure is possible. The C-O single bond is weaker than C=O bond. The C-O single bond character decreases the stiffness of C=O bond. The stretching frequency of C=O band lowers by the Weakening of C=O bond.

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Answer 3

Question

Chapter 15, Problem 15.46P

Interpretation Introduction

Interpretation:

In Section 15.5c, we learned that the frequency of a C=O stretch decreases when the C=O bond is conjugated to a C=C bond. The pertinent resonance contributor of a conjugated carbonyl (C=C-C=O) is to be drawn. Based on the resulting resonance hybrid, the reason for decrease in the frequency is to be explained.

Concept introduction:

When a C=O group is conjugated to a C=C bond, the frequency of the C=O absorption is typically lowered by 20–40 cm−1. The conjugation decreases the stiffness of the C=O bond. If the C=O bond is conjugated to a C=C bond, the resonance structure is possible. The C-O single bond is weaker than C=O bond. The C-O single bond character decreases the stiffness of C=O bond. The stretching frequency of C=O band lowers by the Weakening of C=O bond.

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Answer 4

Question

Chapter 15, Problem 15.46P

Interpretation Introduction

Interpretation:

In Section 15.5c, we learned that the frequency of a C=O stretch decreases when the C=O bond is conjugated to a C=C bond. The pertinent resonance contributor of a conjugated carbonyl (C=C-C=O) is to be drawn. Based on the resulting resonance hybrid, the reason for decrease in the frequency is to be explained.

Concept introduction:

When a C=O group is conjugated to a C=C bond, the frequency of the C=O absorption is typically lowered by 20–40 cm−1. The conjugation decreases the stiffness of the C=O bond. If the C=O bond is conjugated to a C=C bond, the resonance structure is possible. The C-O single bond is weaker than C=O bond. The C-O single bond character decreases the stiffness of C=O bond. The stretching frequency of C=O band lowers by the Weakening of C=O bond.

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Answer 5

Chapter 15, Problem 15.46P

Interpretation Introduction

Interpretation:

In Section 15.5c, we learned that the frequency of a C=O stretch decreases when the C=O bond is conjugated to a C=C bond. The pertinent resonance contributor of a conjugated carbonyl (C=C-C=O) is to be drawn. Based on the resulting resonance hybrid, the reason for decrease in the frequency is to be explained.

Concept introduction:

When a C=O group is conjugated to a C=C bond, the frequency of the C=O absorption is typically lowered by 20–40 cm−1. The conjugation decreases the stiffness of the C=O bond. If the C=O bond is conjugated to a C=C bond, the resonance structure is possible. The C-O single bond is weaker than C=O bond. The C-O single bond character decreases the stiffness of C=O bond. The stretching frequency of C=O band lowers by the Weakening of C=O bond.

Answer 6

Chapter 15, Problem 15.46P

Interpretation Introduction

Interpretation:

In Section 15.5c, we learned that the frequency of a C=O stretch decreases when the C=O bond is conjugated to a C=C bond. The pertinent resonance contributor of a conjugated carbonyl (C=C-C=O) is to be drawn. Based on the resulting resonance hybrid, the reason for decrease in the frequency is to be explained.

Concept introduction:

When a C=O group is conjugated to a C=C bond, the frequency of the C=O absorption is typically lowered by 20–40 cm−1. The conjugation decreases the stiffness of the C=O bond. If the C=O bond is conjugated to a C=C bond, the resonance structure is possible. The C-O single bond is weaker than C=O bond. The C-O single bond character decreases the stiffness of C=O bond. The stretching frequency of C=O band lowers by the Weakening of C=O bond.

Answer 7

Chapter 15, Problem 15.46P

Interpretation Introduction

Interpretation:

In Section 15.5c, we learned that the frequency of a C=O stretch decreases when the C=O bond is conjugated to a C=C bond. The pertinent resonance contributor of a conjugated carbonyl (C=C-C=O) is to be drawn. Based on the resulting resonance hybrid, the reason for decrease in the frequency is to be explained.

Concept introduction:

When a C=O group is conjugated to a C=C bond, the frequency of the C=O absorption is typically lowered by 20–40 cm−1. The conjugation decreases the stiffness of the C=O bond. If the C=O bond is conjugated to a C=C bond, the resonance structure is possible. The C-O single bond is weaker than C=O bond. The C-O single bond character decreases the stiffness of C=O bond. The stretching frequency of C=O band lowers by the Weakening of C=O bond.

Answer 8

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Ch. 15 - Prob. 15.1P Ch. 15 - Prob. 15.2P Ch. 15 - Prob. 15.3P Ch. 15 - Prob. 15.4P Ch. 15 - Prob. 15.5P Ch. 15 - Prob. 15.6P Ch. 15 - Prob. 15.7P Ch. 15 - Prob. 15.8P Ch. 15 - Prob. 15.9P Ch. 15 - Prob. 15.10P

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