In Section 15.5c, we learned that the frequency of the C=O stretch for an amide is lower than it is for a ketone , suggesting that the C=O bond is weaker in an amide. This weakening of the C=O bond can be explained by the significant contribution from one of its resonance structures toward the resonance hybrid. The resonance structure for N, N-dimethylacetamide [CH 3 CON(CH 3 ) 2 ] is to be drawn and how it accounts for the weakening of the C=O bond is to be explained. Concept introduction: The lone pair on nitrogen atom can take part in resonance with C=O bond in amide. 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.

Question

+ Draw the product of the E2 reaction shown below. Include the correct stereochemistry. Ignore any inorganic byproducts. Ph CH2CH3 H H3C H Br DBN [૪] Drawing Atoms, Bonds and Rings H | OH Charges ―00 H. C | Undo Reset Br I Remove Done Drag To Pan +

Answer 1

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 15, Problem 15.43P

Interpretation Introduction

Interpretation:

In Section 15.5c, we learned that the frequency of the C=O stretch for an amide is lower than it is for a ketone, suggesting that the C=O bond is weaker in an amide. This weakening of the C=O bond can be explained by the significant contribution from one of its resonance structures toward the resonance hybrid. The resonance structure for N, N-dimethylacetamide [CH3CON(CH3)2] is to be drawn and how it accounts for the weakening of the C=O bond is to be explained.

Concept introduction:

The lone pair on nitrogen atom can take part in resonance with C=O bond in amide. 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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+ Draw the product of the E2 reaction shown below. Include the correct stereochemistry. Ignore any inorganic byproducts. Ph CH2CH3 H H3C H Br DBN [૪] Drawing Atoms, Bonds and Rings H | OH Charges ―00 H. C | Undo Reset Br I Remove Done Drag To Pan +

Reaction A Now the production A Œ In the product of reaction i 12 Dear the product of action

Macmillan Learnin When an unknown amine reacts with an unknown acid chloride, an amide with a molecular mass of 163 g/mol (M* = 163 m/z) is formed. In the infrared spectrum, important absorptions appear at 1661, 750 and 690 cm-1. The 13C NMR and DEPT spectra are provided. Draw the structure of the product as the resonance contributor lacking any formal charges. 13C NMR DEPT 90 200 160 120 80 40 0 200 160 120 80 DEPT 135 200 160 120 80 40 0 Draw the unknown amide. 40 40 0

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 15, Problem 15.43P

Interpretation Introduction

Interpretation:

In Section 15.5c, we learned that the frequency of the C=O stretch for an amide is lower than it is for a ketone, suggesting that the C=O bond is weaker in an amide. This weakening of the C=O bond can be explained by the significant contribution from one of its resonance structures toward the resonance hybrid. The resonance structure for N, N-dimethylacetamide [CH3CON(CH3)2] is to be drawn and how it accounts for the weakening of the C=O bond is to be explained.

Concept introduction:

The lone pair on nitrogen atom can take part in resonance with C=O bond in amide. 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

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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 15, Problem 15.43P

Interpretation Introduction

Interpretation:

In Section 15.5c, we learned that the frequency of the C=O stretch for an amide is lower than it is for a ketone, suggesting that the C=O bond is weaker in an amide. This weakening of the C=O bond can be explained by the significant contribution from one of its resonance structures toward the resonance hybrid. The resonance structure for N, N-dimethylacetamide [CH3CON(CH3)2] is to be drawn and how it accounts for the weakening of the C=O bond is to be explained.

Concept introduction:

The lone pair on nitrogen atom can take part in resonance with C=O bond in amide. 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

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 15, Problem 15.43P

Interpretation Introduction