Given that 1-phenyl-2-butene has an ultraviolet absorption at λ max = 208nm (∈ = 8000). On treatment with a small amount of strong acid it isomerizes to give a new compound with λ max = 250nm (∈ = 15,800). A structure for the isomer is to be proposed and a mechanism for its formation has to be suggested. Concept introduction: Among two isomers with same molecular formula, the isomer that has extended conjugation will have a higher λ max value than the other. To propose: A structure for the isomer which has an ultraviolet absorption at λ max = 250 nm (∈ = 15,800) obtained when 1-phenyl-2-butene with λ max = 208 nm (∈ = 8000) is treated with strong acids. Further to propose a mechanism for its formation.

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Answer 1

Question

Chapter 15.SE, Problem 46AP

Interpretation Introduction

Interpretation:

Given that 1-phenyl-2-butene has an ultraviolet absorption at λ_max = 208nm (∈ = 8000). On treatment with a small amount of strong acid it isomerizes to give a new compound with λ_max = 250nm (∈ = 15,800). A structure for the isomer is to be proposed and a mechanism for its formation has to be suggested.

Concept introduction:

Among two isomers with same molecular formula, the isomer that has extended conjugation will have a higher λ_max value than the other.

To propose:

A structure for the isomer which has an ultraviolet absorption at λ_max = 250 nm (∈ = 15,800) obtained when 1-phenyl-2-butene with λ_max = 208 nm (∈ = 8000) is treated with strong acids. Further to propose a mechanism for its formation.

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Answer 2

Question

Chapter 15.SE, Problem 46AP

Interpretation Introduction

Interpretation:

Given that 1-phenyl-2-butene has an ultraviolet absorption at λ_max = 208nm (∈ = 8000). On treatment with a small amount of strong acid it isomerizes to give a new compound with λ_max = 250nm (∈ = 15,800). A structure for the isomer is to be proposed and a mechanism for its formation has to be suggested.

Concept introduction:

Among two isomers with same molecular formula, the isomer that has extended conjugation will have a higher λ_max value than the other.

To propose:

A structure for the isomer which has an ultraviolet absorption at λ_max = 250 nm (∈ = 15,800) obtained when 1-phenyl-2-butene with λ_max = 208 nm (∈ = 8000) is treated with strong acids. Further to propose a mechanism for its formation.

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Answer 3

Question

Chapter 15.SE, Problem 46AP

Interpretation Introduction

Interpretation:

Given that 1-phenyl-2-butene has an ultraviolet absorption at λ_max = 208nm (∈ = 8000). On treatment with a small amount of strong acid it isomerizes to give a new compound with λ_max = 250nm (∈ = 15,800). A structure for the isomer is to be proposed and a mechanism for its formation has to be suggested.

Concept introduction:

Among two isomers with same molecular formula, the isomer that has extended conjugation will have a higher λ_max value than the other.

To propose:

A structure for the isomer which has an ultraviolet absorption at λ_max = 250 nm (∈ = 15,800) obtained when 1-phenyl-2-butene with λ_max = 208 nm (∈ = 8000) is treated with strong acids. Further to propose a mechanism for its formation.

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Answer 4

Question

Chapter 15.SE, Problem 46AP

Interpretation Introduction

Interpretation:

Given that 1-phenyl-2-butene has an ultraviolet absorption at λ_max = 208nm (∈ = 8000). On treatment with a small amount of strong acid it isomerizes to give a new compound with λ_max = 250nm (∈ = 15,800). A structure for the isomer is to be proposed and a mechanism for its formation has to be suggested.

Concept introduction:

Among two isomers with same molecular formula, the isomer that has extended conjugation will have a higher λ_max value than the other.

To propose:

A structure for the isomer which has an ultraviolet absorption at λ_max = 250 nm (∈ = 15,800) obtained when 1-phenyl-2-butene with λ_max = 208 nm (∈ = 8000) is treated with strong acids. Further to propose a mechanism for its formation.

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Answer 5

Chapter 15.SE, Problem 46AP

Interpretation Introduction

Interpretation:

Given that 1-phenyl-2-butene has an ultraviolet absorption at λ_max = 208nm (∈ = 8000). On treatment with a small amount of strong acid it isomerizes to give a new compound with λ_max = 250nm (∈ = 15,800). A structure for the isomer is to be proposed and a mechanism for its formation has to be suggested.

Concept introduction:

Among two isomers with same molecular formula, the isomer that has extended conjugation will have a higher λ_max value than the other.

To propose:

A structure for the isomer which has an ultraviolet absorption at λ_max = 250 nm (∈ = 15,800) obtained when 1-phenyl-2-butene with λ_max = 208 nm (∈ = 8000) is treated with strong acids. Further to propose a mechanism for its formation.

Answer 6

Chapter 15.SE, Problem 46AP

Interpretation Introduction

Interpretation:

Given that 1-phenyl-2-butene has an ultraviolet absorption at λ_max = 208nm (∈ = 8000). On treatment with a small amount of strong acid it isomerizes to give a new compound with λ_max = 250nm (∈ = 15,800). A structure for the isomer is to be proposed and a mechanism for its formation has to be suggested.

Concept introduction:

Among two isomers with same molecular formula, the isomer that has extended conjugation will have a higher λ_max value than the other.

To propose:

A structure for the isomer which has an ultraviolet absorption at λ_max = 250 nm (∈ = 15,800) obtained when 1-phenyl-2-butene with λ_max = 208 nm (∈ = 8000) is treated with strong acids. Further to propose a mechanism for its formation.

Answer 7

Chapter 15.SE, Problem 46AP

Interpretation Introduction

Interpretation:

Given that 1-phenyl-2-butene has an ultraviolet absorption at λ_max = 208nm (∈ = 8000). On treatment with a small amount of strong acid it isomerizes to give a new compound with λ_max = 250nm (∈ = 15,800). A structure for the isomer is to be proposed and a mechanism for its formation has to be suggested.

Concept introduction:

Among two isomers with same molecular formula, the isomer that has extended conjugation will have a higher λ_max value than the other.

To propose:

A structure for the isomer which has an ultraviolet absorption at λ_max = 250 nm (∈ = 15,800) obtained when 1-phenyl-2-butene with λ_max = 208 nm (∈ = 8000) is treated with strong acids. Further to propose a mechanism for its formation.

Answer 8

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Answer 9

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Answer 11

Ch. 15.1 - Prob. 1P Ch. 15.1 - Give IUPAC names for the following compounds:Ch. 15.1 - Prob. 3P Ch. 15.2 - Pyridine is a flat, hexagonal molecule with bond...Ch. 15.3 - Prob. 5P Ch. 15.4 - Draw the five resonance structures of the...Ch. 15.4 - Prob. 7P Ch. 15.4 - Prob. 8P Ch. 15.5 - Prob. 9P Ch. 15.5 - Prob. 10P

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