(a) Interpretation: When compound A is irradiated with ultraviolet light for 115 hours in pentane, an isomeric compound B is obtained that decolorizes bromine in CH 2 Cl 2 and reacts with ozone to give, after the usual workup, a compound C. The structure of B and the stereochemistry of both B and C is to be given. Concept introduction: Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved. In [4+2] cycloaddition one component is having four electrons and other component is having two electrons.

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Answer 1

Question

Chapter 28, Problem 28.34AP

Interpretation Introduction

(a)

Interpretation:

When compound A is irradiated with ultraviolet light for 115 hours in pentane, an isomeric compound B is obtained that decolorizes bromine in CH₂Cl₂ and reacts with ozone to give, after the usual workup, a compound C.

The structure of B and the stereochemistry of both B and C is to be given.

Concept introduction:

Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved. In [4+2] cycloaddition one component is having four electrons and other component is having two electrons.

Interpretation Introduction

(b)

Interpretation:

On heating to 90 °C, compound D, a stereoisomer of B, is converted into A, but compound B is virtually inert under the same conditions. The compound D is to be identified with reasons.

Concept introduction:

Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved. In [4+2] cycloaddition one component is having four electrons and other component is having two electrons.

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Answer 2

Question

Chapter 28, Problem 28.34AP

Interpretation Introduction

(a)

Interpretation:

When compound A is irradiated with ultraviolet light for 115 hours in pentane, an isomeric compound B is obtained that decolorizes bromine in CH₂Cl₂ and reacts with ozone to give, after the usual workup, a compound C.

The structure of B and the stereochemistry of both B and C is to be given.

Concept introduction:

Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved. In [4+2] cycloaddition one component is having four electrons and other component is having two electrons.

Interpretation Introduction

(b)

Interpretation:

On heating to 90 °C, compound D, a stereoisomer of B, is converted into A, but compound B is virtually inert under the same conditions. The compound D is to be identified with reasons.

Concept introduction:

Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved. In [4+2] cycloaddition one component is having four electrons and other component is having two electrons.

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Answer 3

Question

Chapter 28, Problem 28.34AP

Interpretation Introduction

(a)

Interpretation:

When compound A is irradiated with ultraviolet light for 115 hours in pentane, an isomeric compound B is obtained that decolorizes bromine in CH₂Cl₂ and reacts with ozone to give, after the usual workup, a compound C.

The structure of B and the stereochemistry of both B and C is to be given.

Concept introduction:

Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved. In [4+2] cycloaddition one component is having four electrons and other component is having two electrons.

Interpretation Introduction

(b)

Interpretation:

On heating to 90 °C, compound D, a stereoisomer of B, is converted into A, but compound B is virtually inert under the same conditions. The compound D is to be identified with reasons.

Concept introduction:

Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved. In [4+2] cycloaddition one component is having four electrons and other component is having two electrons.

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Answer 4

Question

Chapter 28, Problem 28.34AP

Interpretation Introduction

(a)

Interpretation:

When compound A is irradiated with ultraviolet light for 115 hours in pentane, an isomeric compound B is obtained that decolorizes bromine in CH₂Cl₂ and reacts with ozone to give, after the usual workup, a compound C.

The structure of B and the stereochemistry of both B and C is to be given.

Concept introduction:

Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved. In [4+2] cycloaddition one component is having four electrons and other component is having two electrons.

Interpretation Introduction

(b)

Interpretation:

On heating to 90 °C, compound D, a stereoisomer of B, is converted into A, but compound B is virtually inert under the same conditions. The compound D is to be identified with reasons.

Concept introduction:

Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved. In [4+2] cycloaddition one component is having four electrons and other component is having two electrons.

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Answer 5

Chapter 28, Problem 28.34AP

Interpretation Introduction

(a)

Interpretation:

When compound A is irradiated with ultraviolet light for 115 hours in pentane, an isomeric compound B is obtained that decolorizes bromine in CH₂Cl₂ and reacts with ozone to give, after the usual workup, a compound C.

The structure of B and the stereochemistry of both B and C is to be given.

Concept introduction:

Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved. In [4+2] cycloaddition one component is having four electrons and other component is having two electrons.

Interpretation Introduction

(b)

Interpretation:

On heating to 90 °C, compound D, a stereoisomer of B, is converted into A, but compound B is virtually inert under the same conditions. The compound D is to be identified with reasons.

Concept introduction:

Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved. In [4+2] cycloaddition one component is having four electrons and other component is having two electrons.

Answer 6

Chapter 28, Problem 28.34AP

Interpretation Introduction

(a)

Interpretation:

When compound A is irradiated with ultraviolet light for 115 hours in pentane, an isomeric compound B is obtained that decolorizes bromine in CH₂Cl₂ and reacts with ozone to give, after the usual workup, a compound C.

The structure of B and the stereochemistry of both B and C is to be given.

Concept introduction:

Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved. In [4+2] cycloaddition one component is having four electrons and other component is having two electrons.

Answer 7

Chapter 28, Problem 28.34AP

Interpretation Introduction

(a)

Interpretation:

When compound A is irradiated with ultraviolet light for 115 hours in pentane, an isomeric compound B is obtained that decolorizes bromine in CH₂Cl₂ and reacts with ozone to give, after the usual workup, a compound C.

The structure of B and the stereochemistry of both B and C is to be given.

Concept introduction:

Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved. In [4+2] cycloaddition one component is having four electrons and other component is having two electrons.

Answer 8

Interpretation Introduction

(b)

Interpretation:

On heating to 90 °C, compound D, a stereoisomer of B, is converted into A, but compound B is virtually inert under the same conditions. The compound D is to be identified with reasons.

Concept introduction:

Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved. In [4+2] cycloaddition one component is having four electrons and other component is having two electrons.

Answer 9

Interpretation Introduction

(b)

Interpretation:

On heating to 90 °C, compound D, a stereoisomer of B, is converted into A, but compound B is virtually inert under the same conditions. The compound D is to be identified with reasons.

Concept introduction:

Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved. In [4+2] cycloaddition one component is having four electrons and other component is having two electrons.

Answer 10

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Answer 11

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Answer 13

Ch. 28 - Prob. 28.1P Ch. 28 - Prob. 28.2P Ch. 28 - Prob. 28.3P Ch. 28 - Prob. 28.4P Ch. 28 - Prob. 28.5P Ch. 28 - Prob. 28.6P Ch. 28 - Prob. 28.7P Ch. 28 - Prob. 28.8P Ch. 28 - Prob. 28.9P Ch. 28 - Prob. 28.10P

Solution Summary: The author explains that cycloaddition reaction is a reaction of two different -electron systems to form an ring product.

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