(a) Interpretation: The by-products of the given reaction are to be drawn and the movement of electrons is to be shown by using curved arrow notation. Concept introduction: In E2 elimination reactions, the proton is abstracted from the beta carbon to form an alkene . A concerted mechanism is followed for this type of reactions and by-products are also possible.

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Answer 1

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Chapter 8, Problem 8.38P

Interpretation Introduction

(a)

Interpretation: The by-products of the given reaction are to be drawn and the movement of electrons is to be shown by using curved arrow notation.

Concept introduction: In E2 elimination reactions, the proton is abstracted from the beta carbon to form an alkene. A concerted mechanism is followed for this type of reactions and by-products are also possible.

Interpretation Introduction

(b)

Interpretation: The effect of the given change on the reaction rate is to be stated.

Concept introduction: In E2 elimination reactions, substituents which are adjacent to each other are eliminated from an alkyl halide to form an alkene. A concerted mechanism is followed for this type of reactions.

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Consider the attached E2 reaction What happens to the reaction rate with each of the following changes?[1] The solvent is changed to DMF. [2] The concentration of −OC(CH3)3 is decreased. [3] The base is changed to −OH. [4] The halide is changed to CH3CH2CH2CH2CH(Br)CH3. [5] The leaving group is changed to I−.

How does changing the base from −OH to H2O affect the rate of an E2 reaction?

Consider the following SN2 reaction.a.Draw a mechanism using curved arrows. b. Draw an energy diagram. Label the axes, the reactants, products, Ea, and ΔH°. Assume that the reaction is exothermic. c. Draw the structure of the transition state. d.What is the rate equation? e.What happens to the reaction rate in each of the following instances? [1] The leaving group is changed from Br− to I−; [2] The solvent is changed from acetone to CH3CH2OH; [3] The alkyl halide is changed from CH3(CH2)4Br to CH3CH2CH2CH(Br)CH3; [4] The concentration of −CN is increased by a factor of five; and [5] The concentrations of both the alkyl halide and −CN are increased by a factor of five.

Answer 2

Question

Chapter 8, Problem 8.38P

Interpretation Introduction

(a)

Interpretation: The by-products of the given reaction are to be drawn and the movement of electrons is to be shown by using curved arrow notation.

Concept introduction: In E2 elimination reactions, the proton is abstracted from the beta carbon to form an alkene. A concerted mechanism is followed for this type of reactions and by-products are also possible.

Interpretation Introduction

(b)

Interpretation: The effect of the given change on the reaction rate is to be stated.

Concept introduction: In E2 elimination reactions, substituents which are adjacent to each other are eliminated from an alkyl halide to form an alkene. A concerted mechanism is followed for this type of reactions.

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Answer 3

Question

Chapter 8, Problem 8.38P

Interpretation Introduction

(a)

Interpretation: The by-products of the given reaction are to be drawn and the movement of electrons is to be shown by using curved arrow notation.

Concept introduction: In E2 elimination reactions, the proton is abstracted from the beta carbon to form an alkene. A concerted mechanism is followed for this type of reactions and by-products are also possible.

Interpretation Introduction

(b)

Interpretation: The effect of the given change on the reaction rate is to be stated.

Concept introduction: In E2 elimination reactions, substituents which are adjacent to each other are eliminated from an alkyl halide to form an alkene. A concerted mechanism is followed for this type of reactions.

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Answer 4

Question

Chapter 8, Problem 8.38P

Interpretation Introduction

(a)

Interpretation: The by-products of the given reaction are to be drawn and the movement of electrons is to be shown by using curved arrow notation.

Concept introduction: In E2 elimination reactions, the proton is abstracted from the beta carbon to form an alkene. A concerted mechanism is followed for this type of reactions and by-products are also possible.

Interpretation Introduction

(b)

Interpretation: The effect of the given change on the reaction rate is to be stated.

Concept introduction: In E2 elimination reactions, substituents which are adjacent to each other are eliminated from an alkyl halide to form an alkene. A concerted mechanism is followed for this type of reactions.

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Answer 5

Chapter 8, Problem 8.38P

Interpretation Introduction

(a)

Interpretation: The by-products of the given reaction are to be drawn and the movement of electrons is to be shown by using curved arrow notation.

Concept introduction: In E2 elimination reactions, the proton is abstracted from the beta carbon to form an alkene. A concerted mechanism is followed for this type of reactions and by-products are also possible.

Interpretation Introduction

(b)

Interpretation: The effect of the given change on the reaction rate is to be stated.

Concept introduction: In E2 elimination reactions, substituents which are adjacent to each other are eliminated from an alkyl halide to form an alkene. A concerted mechanism is followed for this type of reactions.

Answer 6

Chapter 8, Problem 8.38P

Interpretation Introduction

(a)

Interpretation: The by-products of the given reaction are to be drawn and the movement of electrons is to be shown by using curved arrow notation.

Concept introduction: In E2 elimination reactions, the proton is abstracted from the beta carbon to form an alkene. A concerted mechanism is followed for this type of reactions and by-products are also possible.

Answer 7

Chapter 8, Problem 8.38P

Interpretation Introduction

(a)

Interpretation: The by-products of the given reaction are to be drawn and the movement of electrons is to be shown by using curved arrow notation.

Concept introduction: In E2 elimination reactions, the proton is abstracted from the beta carbon to form an alkene. A concerted mechanism is followed for this type of reactions and by-products are also possible.

Answer 8

Interpretation Introduction

(b)

Interpretation: The effect of the given change on the reaction rate is to be stated.

Concept introduction: In E2 elimination reactions, substituents which are adjacent to each other are eliminated from an alkyl halide to form an alkene. A concerted mechanism is followed for this type of reactions.

Answer 9

Interpretation Introduction

(b)

Interpretation: The effect of the given change on the reaction rate is to be stated.

Concept introduction: In E2 elimination reactions, substituents which are adjacent to each other are eliminated from an alkyl halide to form an alkene. A concerted mechanism is followed for this type of reactions.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 8 - Label the and carbons in each alkyl halide. Draw...Ch. 8 - Problem 8.2 Classify each alkene in the following...Ch. 8 - Prob. 8.3P Ch. 8 - Prob. 8.4P Ch. 8 - Problem 8.5 Label each pair of alkenes as...Ch. 8 - Prob. 8.6P Ch. 8 - Problem 8.7 Several factors can affect alkene...Ch. 8 - Prob. 8.8P Ch. 8 - Prob. 8.9P Ch. 8 - Prob. 8.10P

Solution Summary: The author explains that in E2 elimination reactions, the proton is abstracted from the beta carbon to form an alkene.

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