(a) Interpretation: The given compound can be produced from two different Diels-Alder reactions. The reactants that would be required for each reaction are to be drawn. Concept introduction: The Diels-Alder reaction (also known as [4+2] cycloaddition) joins a conjugated diene and a dienophile (an alkene or an alkyne ) via the formation of two new sigma bonds. The six membered ring of carbon atoms has formed as a product. If the double bonds in the diene are either both trans or both cis, then the substituents at the ends of the diene become cis to each other with respect to the plane of the ring in the product. Electron-withdrawing groups must be a part of a dienophile while electron-donating groups must be a part of the diene to facilitate the cycloaddition. The stereochemical configuration in the dienophile is conserved throughout a Diels-Alder reaction.

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Answer 1

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Chapter 24, Problem 24.46P

Interpretation Introduction

(a)

Interpretation:

The given compound can be produced from two different Diels-Alder reactions. The reactants that would be required for each reaction are to be drawn.

Concept introduction:

The Diels-Alder reaction (also known as [4+2] cycloaddition) joins a conjugated diene and a dienophile (an alkene or an alkyne) via the formation of two new sigma bonds. The six membered ring of carbon atoms has formed as a product.

If the double bonds in the diene are either both trans or both cis, then the substituents at the ends of the diene become cis to each other with respect to the plane of the ring in the product. Electron-withdrawing groups must be a part of a dienophile while electron-donating groups must be a part of the diene to facilitate the cycloaddition. The stereochemical configuration in the dienophile is conserved throughout a Diels-Alder reaction.

Interpretation Introduction

(b)

Interpretation:

Out of the two sets of reactants, which set would be a better choice is to be identified and exaplained.

Concept introduction:

The Diels-Alder reaction (also known as [4+2] cycloaddition) joins a conjugated diene and a dienophile (an alkene or an alkyne) via the formation of two new sigma bonds. The six membered ring of carbon atoms has formed as a product.

If the double bonds in the diene are either both trans or both cis, then the substituents at the ends of the diene become cis to each other with respect to the plane of the ring in the product. Electron-withdrawing groups must be a part of a dienophile while electron-donating groups must be a part of the diene to facilitate the cycloaddition. The stereochemical configuration in the dienophile is conserved throughout a Diels-Alder reaction.

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(a 4 shows scanning electron microscope (SEM) images of extruded actions of packing bed for two capillary columns of different diameters, al 750 (bottom image) and b) 30-μm-i.d. Both columns are packed with the same stationary phase, spherical particles with 1-um diameter. A) When the columns were prepared, the figure shows that the column with the larger diameter has more packing irregularities. Explain this observation. B) Predict what affect this should have on band broadening and discuss your prediction using the van Deemter terms. C) Does this figure support your explanations in application question 33? Explain why or why not and make any changes in your answers in light of this figure. Figure 4 SEM images of sections of packed columns for a) 750 and b) 30-um-i.d. capillary columns.³

fcrip = ↓ bandwidth Il temp 32. What impact (increase, decrease, or no change) does each of the following conditions have on the individual components of the van Deemter equation and consequently, band broadening? Increase temperature Longer column Using a gas mobile phase instead of liquid Smaller particle stationary phase Multiple Paths Diffusion Mass Transfer

34. Figure 3 shows Van Deemter plots for a solute molecule using different column inner diameters (i.d.). A) Predict whether decreasing the column inner diameters increase or decrease bandwidth. B) Predict which van Deemter equation coefficient (A, B, or C) has the greatest effect on increasing or decreasing bandwidth as a function of i.d. and justify your answer. Figure 3 Van Deemter plots for hydroquinone using different column inner diameters (i.d. in μm). The data was obtained from liquid chromatography experiments using fused-silica capillary columns packed with 1.0-μm particles. 35 20 H(um) 큰 20 15 90 0+ 1500 100 75 550 01 02 594 05 μ(cm/sec) 30 15 10

Answer 2

Question

Chapter 24, Problem 24.46P

Interpretation Introduction

(a)

Interpretation:

The given compound can be produced from two different Diels-Alder reactions. The reactants that would be required for each reaction are to be drawn.

Concept introduction:

The Diels-Alder reaction (also known as [4+2] cycloaddition) joins a conjugated diene and a dienophile (an alkene or an alkyne) via the formation of two new sigma bonds. The six membered ring of carbon atoms has formed as a product.

If the double bonds in the diene are either both trans or both cis, then the substituents at the ends of the diene become cis to each other with respect to the plane of the ring in the product. Electron-withdrawing groups must be a part of a dienophile while electron-donating groups must be a part of the diene to facilitate the cycloaddition. The stereochemical configuration in the dienophile is conserved throughout a Diels-Alder reaction.

Interpretation Introduction

(b)

Interpretation:

Out of the two sets of reactants, which set would be a better choice is to be identified and exaplained.

Concept introduction:

The Diels-Alder reaction (also known as [4+2] cycloaddition) joins a conjugated diene and a dienophile (an alkene or an alkyne) via the formation of two new sigma bonds. The six membered ring of carbon atoms has formed as a product.

If the double bonds in the diene are either both trans or both cis, then the substituents at the ends of the diene become cis to each other with respect to the plane of the ring in the product. Electron-withdrawing groups must be a part of a dienophile while electron-donating groups must be a part of the diene to facilitate the cycloaddition. The stereochemical configuration in the dienophile is conserved throughout a Diels-Alder reaction.

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Answer 3

Question

Chapter 24, Problem 24.46P

Interpretation Introduction

(a)

Interpretation:

The given compound can be produced from two different Diels-Alder reactions. The reactants that would be required for each reaction are to be drawn.

Concept introduction:

The Diels-Alder reaction (also known as [4+2] cycloaddition) joins a conjugated diene and a dienophile (an alkene or an alkyne) via the formation of two new sigma bonds. The six membered ring of carbon atoms has formed as a product.

If the double bonds in the diene are either both trans or both cis, then the substituents at the ends of the diene become cis to each other with respect to the plane of the ring in the product. Electron-withdrawing groups must be a part of a dienophile while electron-donating groups must be a part of the diene to facilitate the cycloaddition. The stereochemical configuration in the dienophile is conserved throughout a Diels-Alder reaction.

Interpretation Introduction

(b)

Interpretation:

Out of the two sets of reactants, which set would be a better choice is to be identified and exaplained.

Concept introduction:

The Diels-Alder reaction (also known as [4+2] cycloaddition) joins a conjugated diene and a dienophile (an alkene or an alkyne) via the formation of two new sigma bonds. The six membered ring of carbon atoms has formed as a product.

If the double bonds in the diene are either both trans or both cis, then the substituents at the ends of the diene become cis to each other with respect to the plane of the ring in the product. Electron-withdrawing groups must be a part of a dienophile while electron-donating groups must be a part of the diene to facilitate the cycloaddition. The stereochemical configuration in the dienophile is conserved throughout a Diels-Alder reaction.

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Answer 4

Question

Chapter 24, Problem 24.46P

Interpretation Introduction

(a)

Interpretation:

The given compound can be produced from two different Diels-Alder reactions. The reactants that would be required for each reaction are to be drawn.

Concept introduction:

The Diels-Alder reaction (also known as [4+2] cycloaddition) joins a conjugated diene and a dienophile (an alkene or an alkyne) via the formation of two new sigma bonds. The six membered ring of carbon atoms has formed as a product.

If the double bonds in the diene are either both trans or both cis, then the substituents at the ends of the diene become cis to each other with respect to the plane of the ring in the product. Electron-withdrawing groups must be a part of a dienophile while electron-donating groups must be a part of the diene to facilitate the cycloaddition. The stereochemical configuration in the dienophile is conserved throughout a Diels-Alder reaction.

Interpretation Introduction

(b)

Interpretation:

Out of the two sets of reactants, which set would be a better choice is to be identified and exaplained.

Concept introduction:

The Diels-Alder reaction (also known as [4+2] cycloaddition) joins a conjugated diene and a dienophile (an alkene or an alkyne) via the formation of two new sigma bonds. The six membered ring of carbon atoms has formed as a product.

If the double bonds in the diene are either both trans or both cis, then the substituents at the ends of the diene become cis to each other with respect to the plane of the ring in the product. Electron-withdrawing groups must be a part of a dienophile while electron-donating groups must be a part of the diene to facilitate the cycloaddition. The stereochemical configuration in the dienophile is conserved throughout a Diels-Alder reaction.

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Answer 5

Chapter 24, Problem 24.46P

Interpretation Introduction

(a)

Interpretation:

The given compound can be produced from two different Diels-Alder reactions. The reactants that would be required for each reaction are to be drawn.

Concept introduction:

The Diels-Alder reaction (also known as [4+2] cycloaddition) joins a conjugated diene and a dienophile (an alkene or an alkyne) via the formation of two new sigma bonds. The six membered ring of carbon atoms has formed as a product.

If the double bonds in the diene are either both trans or both cis, then the substituents at the ends of the diene become cis to each other with respect to the plane of the ring in the product. Electron-withdrawing groups must be a part of a dienophile while electron-donating groups must be a part of the diene to facilitate the cycloaddition. The stereochemical configuration in the dienophile is conserved throughout a Diels-Alder reaction.

Interpretation Introduction

(b)

Interpretation:

Out of the two sets of reactants, which set would be a better choice is to be identified and exaplained.

Concept introduction:

The Diels-Alder reaction (also known as [4+2] cycloaddition) joins a conjugated diene and a dienophile (an alkene or an alkyne) via the formation of two new sigma bonds. The six membered ring of carbon atoms has formed as a product.

If the double bonds in the diene are either both trans or both cis, then the substituents at the ends of the diene become cis to each other with respect to the plane of the ring in the product. Electron-withdrawing groups must be a part of a dienophile while electron-donating groups must be a part of the diene to facilitate the cycloaddition. The stereochemical configuration in the dienophile is conserved throughout a Diels-Alder reaction.

Answer 6

Chapter 24, Problem 24.46P

Interpretation Introduction

(a)

Interpretation:

The given compound can be produced from two different Diels-Alder reactions. The reactants that would be required for each reaction are to be drawn.

Concept introduction:

The Diels-Alder reaction (also known as [4+2] cycloaddition) joins a conjugated diene and a dienophile (an alkene or an alkyne) via the formation of two new sigma bonds. The six membered ring of carbon atoms has formed as a product.

If the double bonds in the diene are either both trans or both cis, then the substituents at the ends of the diene become cis to each other with respect to the plane of the ring in the product. Electron-withdrawing groups must be a part of a dienophile while electron-donating groups must be a part of the diene to facilitate the cycloaddition. The stereochemical configuration in the dienophile is conserved throughout a Diels-Alder reaction.

Answer 7

Chapter 24, Problem 24.46P

Interpretation Introduction

(a)

Interpretation:

The given compound can be produced from two different Diels-Alder reactions. The reactants that would be required for each reaction are to be drawn.

Concept introduction:

The Diels-Alder reaction (also known as [4+2] cycloaddition) joins a conjugated diene and a dienophile (an alkene or an alkyne) via the formation of two new sigma bonds. The six membered ring of carbon atoms has formed as a product.

If the double bonds in the diene are either both trans or both cis, then the substituents at the ends of the diene become cis to each other with respect to the plane of the ring in the product. Electron-withdrawing groups must be a part of a dienophile while electron-donating groups must be a part of the diene to facilitate the cycloaddition. The stereochemical configuration in the dienophile is conserved throughout a Diels-Alder reaction.

Answer 8

Interpretation Introduction

(b)

Interpretation:

Out of the two sets of reactants, which set would be a better choice is to be identified and exaplained.

Concept introduction:

The Diels-Alder reaction (also known as [4+2] cycloaddition) joins a conjugated diene and a dienophile (an alkene or an alkyne) via the formation of two new sigma bonds. The six membered ring of carbon atoms has formed as a product.

If the double bonds in the diene are either both trans or both cis, then the substituents at the ends of the diene become cis to each other with respect to the plane of the ring in the product. Electron-withdrawing groups must be a part of a dienophile while electron-donating groups must be a part of the diene to facilitate the cycloaddition. The stereochemical configuration in the dienophile is conserved throughout a Diels-Alder reaction.

Answer 9

Interpretation Introduction

(b)

Interpretation:

Out of the two sets of reactants, which set would be a better choice is to be identified and exaplained.

Concept introduction:

The Diels-Alder reaction (also known as [4+2] cycloaddition) joins a conjugated diene and a dienophile (an alkene or an alkyne) via the formation of two new sigma bonds. The six membered ring of carbon atoms has formed as a product.

If the double bonds in the diene are either both trans or both cis, then the substituents at the ends of the diene become cis to each other with respect to the plane of the ring in the product. Electron-withdrawing groups must be a part of a dienophile while electron-donating groups must be a part of the diene to facilitate the cycloaddition. The stereochemical configuration in the dienophile is conserved throughout a Diels-Alder reaction.

Answer 10

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Answer 13

Ch. 24 - Prob. 24.1P Ch. 24 - Prob. 24.2P Ch. 24 - Prob. 24.3P Ch. 24 - Prob. 24.4P Ch. 24 - Prob. 24.5P Ch. 24 - Prob. 24.6P Ch. 24 - Prob. 24.7P Ch. 24 - Prob. 24.8P Ch. 24 - Prob. 24.9P Ch. 24 - Prob. 24.10P

Solution Summary: The author explains that the compound can be produced from two different Diels-Alder reactions.

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Chapter 24 Solutions