Exam 9: Nucleophilic Substitution and Beta-Elimination

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Provide a neatly drawn mechanism for the following reaction, including curved arrows to show the movement of pairs of electrons and the structure of reactive intermediates.

(Essay)

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Question 41

Which of the following reactions corresponds to a substitution?

(Multiple Choice)

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Question 42

What is the major organic product obtained from the following reaction?

(Essay)

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Question 43

Which of the following energy diagrams represents the course of an exothermic S_N1 reaction?

(Multiple Choice)

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Question 44

Which of the following energy diagrams represents the course of an exothermic E1 reaction?

(Multiple Choice)

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Question 45

For each substrate below, choose which reaction type is favored. Place the letter of the reaction type in the blank to the left of the substrate. -______

(Multiple Choice)

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Question 46

The reaction of 1-bromopropane with sodium iodide gives 1-iodopropane. What is the effect of doubling the concentration of NaI on the rate of the reaction?

(Multiple Choice)

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Question 47

What is the major elimination product obtained from the following reaction?

(Multiple Choice)

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Question 48

The rate law for the following reaction would be of the form Rate = k[A][B].

(True/False)

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Question 49

What is the best choice of reagent to perform the following transformation?

(Multiple Choice)

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Question 50

The first step in the mechanism for the following reaction would be the formation of a secondary carbocation.

(True/False)

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Question 51

What is the major organic product obtained from the following reaction?

(Essay)

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Question 52

Which of the following represents the transition state of the rate-determining step in the reaction between tert-butyl bromide and methanol leading to elimination?

(Multiple Choice)

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Question 53

The reaction of methyl iodide with sodium azide, NaN₃, proceeds by an S_N2 mechanism. What is the effect of doubling the concentration of NaN₃ on the rate of the reaction?

(Multiple Choice)

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Question 54

Classify each of the following species ,Place the letter of the choice in the blank to the left of the formula. -________

(Multiple Choice)

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Question 55

What is the major organic product obtained from the following reaction?

(Essay)

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Question 56

Which of the following represents the transition state of the reaction between methyl bromide and sodium methylthiolate, NaSCH₃?

(Multiple Choice)

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Question 57

In the following reaction the cyanide ion is both a nucleophile and a Lewis acid.

(True/False)

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Question 58

Which of the following represents the transition state of the rate-determining step in the reaction between 2-bromopropane and sodium methoxide leading to elimination?

(Multiple Choice)

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Question 59

Which of the following alkyl bromides reacts the slowest with NaSCH₃ in DMF?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 111

Exam 9: Nucleophilic Substitution and Beta-Elimination

Provide a neatly drawn mechanism for the following reaction, including curved arrows to show the movement of pairs of electrons and the structure of reactive intermediates.

Which of the following reactions corresponds to a substitution?

What is the major organic product obtained from the following reaction?

Which of the following energy diagrams represents the course of an exothermic SN1 reaction?

Which of the following energy diagrams represents the course of an exothermic E1 reaction?

For each substrate below, choose which reaction type is favored. Place the letter of the reaction type in the blank to the left of the substrate. -______

The reaction of 1-bromopropane with sodium iodide gives 1-iodopropane. What is the effect of doubling the concentration of NaI on the rate of the reaction?

What is the major elimination product obtained from the following reaction?

The rate law for the following reaction would be of the form Rate = k[A][B].

What is the best choice of reagent to perform the following transformation?

The first step in the mechanism for the following reaction would be the formation of a secondary carbocation.

What is the major organic product obtained from the following reaction?

Which of the following represents the transition state of the rate-determining step in the reaction between tert-butyl bromide and methanol leading to elimination?

The reaction of methyl iodide with sodium azide, NaN3, proceeds by an SN2 mechanism. What is the effect of doubling the concentration of NaN3 on the rate of the reaction?

Classify each of the following species ,Place the letter of the choice in the blank to the left of the formula. -________

What is the major organic product obtained from the following reaction?

Which of the following represents the transition state of the reaction between methyl bromide and sodium methylthiolate, NaSCH3?

In the following reaction the cyanide ion is both a nucleophile and a Lewis acid.

Which of the following represents the transition state of the rate-determining step in the reaction between 2-bromopropane and sodium methoxide leading to elimination?

Which of the following alkyl bromides reacts the slowest with NaSCH3 in DMF?

Covalent Bonding and Shapes of Molecules

Alkanes and Cycloalkanes

Stereoisomerism and Chirality

Acids and Bases

Alkenes: Bonding, Nomenclature, and Properties

Reactions of Alkenes

Alkynes

Haloalkanes, Halogenation, and Radical Reactions

Alcohols

Ethers, Epoxides, and Sulfides

Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Mass Spectrometry

An Introduction to Organometallic Compounds

Aldehydes and Ketones

Carboxylic Acids

Functional Derivatives of Carboxylic Acids

Enolate Anions and Enamines

Dienes, Conjugated Systems, and Pericyclic Reactions

Benzene and the Concept of Aromaticity

Reactions of Benzene and Its Derivatives

Amines

Catalytic Carbon-Carbon Bond Formation

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids

Organic Polymer Chemistry

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Which of the following energy diagrams represents the course of an exothermic S_N1 reaction?

The reaction of methyl iodide with sodium azide, NaN₃, proceeds by an S_N2 mechanism. What is the effect of doubling the concentration of NaN₃ on the rate of the reaction?

Which of the following represents the transition state of the reaction between methyl bromide and sodium methylthiolate, NaSCH₃?

Which of the following alkyl bromides reacts the slowest with NaSCH₃ in DMF?