(a) Interpretation: For the given Diels-Alder reaction, the mechanism and the major product are to be drawn, paying attention to regiochemistry. 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 product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to achieve the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitate the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

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Answer 1

Question

Chapter 24, Problem 24.48P

Interpretation Introduction

(a)

Interpretation:

For the given Diels-Alder reaction, the mechanism and the major product are to be drawn, paying attention to regiochemistry.

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 product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to achieve the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitate the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

Interpretation Introduction

(b)

Interpretation:

For the given Diels-Alder reaction, the mechanism and the major product are to be drawn, paying attention to regiochemistry.

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 product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to achieve the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitate the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

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Dr. Mendel asked his BIOL 260 class what their height was and what their parent's heights were. He plotted that data in the graph below to determine if height was a heritable trait. A. Is height a heritable trait? If yes, what is the heritability value? (2 pts) B. If the phenotypic variation is 30, what is the variation due to additive alleles? (2 pts) Offspring Height (Inches) 75 67.5 60 52.5 y = 0.9264x + 4.8519 55 60 65 MidParent Height (Inches) 70 75 12pt v V Paragraph B IUA > AT2 v V

Experiment: Each team will be provided with 5g of a mixture of acetanilide and salicylic acid. You will divide it into three 1.5 g portions in separate 125 mL Erlenmeyer flasks savıng some for melting point analysis. Dissolve the mixture in each flask in ~60mL of DI water by heating to boiling on a hotplate. Take the flasks off the hotplate once you have a clear solution and let them stand on the bench top for 5 mins and then allow them to cool as described below. Sample A-Let the first sample cool slowly to room temperature by letting it stand on your lab bench, with occasional stirring to promote crystallization. Sample B-Cool the second sample 1n a tap-water bath to 10-15 °C Sample C-Cool the third sample in an ice-bath to 0-2 °C Results: weight after recrystalization and melting point temp. A=0.624g,102-115° B=0.765g, 80-105° C=1.135g, 77-108 What is the percent yield of A,B, and C.

Answer 2

Question

Chapter 24, Problem 24.48P

Interpretation Introduction

(a)

Interpretation:

For the given Diels-Alder reaction, the mechanism and the major product are to be drawn, paying attention to regiochemistry.

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 product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to achieve the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitate the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

Interpretation Introduction

(b)

Interpretation:

For the given Diels-Alder reaction, the mechanism and the major product are to be drawn, paying attention to regiochemistry.

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 product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to achieve the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitate the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

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Answer 3

Question

Chapter 24, Problem 24.48P

Interpretation Introduction

(a)

Interpretation:

For the given Diels-Alder reaction, the mechanism and the major product are to be drawn, paying attention to regiochemistry.

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 product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to achieve the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitate the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

Interpretation Introduction

(b)

Interpretation:

For the given Diels-Alder reaction, the mechanism and the major product are to be drawn, paying attention to regiochemistry.

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 product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to achieve the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitate the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

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Answer 4

Question

Chapter 24, Problem 24.48P

Interpretation Introduction

(a)

Interpretation:

For the given Diels-Alder reaction, the mechanism and the major product are to be drawn, paying attention to regiochemistry.

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 product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to achieve the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitate the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

Interpretation Introduction

(b)

Interpretation:

For the given Diels-Alder reaction, the mechanism and the major product are to be drawn, paying attention to regiochemistry.

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 product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to achieve the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitate the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

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Answer 5

Chapter 24, Problem 24.48P

Interpretation Introduction

(a)

Interpretation:

For the given Diels-Alder reaction, the mechanism and the major product are to be drawn, paying attention to regiochemistry.

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 product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to achieve the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitate the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

Interpretation Introduction

(b)

Interpretation:

For the given Diels-Alder reaction, the mechanism and the major product are to be drawn, paying attention to regiochemistry.

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 product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to achieve the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitate the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

Answer 6

Chapter 24, Problem 24.48P

Interpretation Introduction

(a)

Interpretation:

For the given Diels-Alder reaction, the mechanism and the major product are to be drawn, paying attention to regiochemistry.

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 product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to achieve the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitate the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

Answer 7

Chapter 24, Problem 24.48P

Interpretation Introduction

(a)

Interpretation:

For the given Diels-Alder reaction, the mechanism and the major product are to be drawn, paying attention to regiochemistry.

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 product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to achieve the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitate the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

Answer 8

Interpretation Introduction

(b)

Interpretation:

For the given Diels-Alder reaction, the mechanism and the major product are to be drawn, paying attention to regiochemistry.

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 product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to achieve the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitate the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

Answer 9

Interpretation Introduction

(b)

Interpretation:

For the given Diels-Alder reaction, the mechanism and the major product are to be drawn, paying attention to regiochemistry.

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 product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to achieve the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitate the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

Answer 10

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Answer 11

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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

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Chapter 24 Solutions