Question 1

Which of the following molecules can tautomerize?

Accepted Answer

A)  I
B)  II
C)  III
D)  IV
E)  All of these E

Question 2

Which of the following is true about spectator ions?

Accepted Answer

A)  They can be disregarded when drawing mechanisms.
B)  They are located in group 4A.
C)  They are highly insoluble.
D)  They are great targets for nucleophiles.
E)  They are highly reactive species.

Question 3

What is the most likely mechanism for the following reaction? N2 B) E2 C) Electrophilic addition D) 1,2 methyl shift E) Nucleophilic addition" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  SN2
B)  E2
C)  Electrophilic addition
D)  1,2 methyl shift
E)  Nucleophilic addition

Question 4

In the following reaction,identify all electron-rich and electron-poor sites in the starting materials,and supply the missing mechanism arrows required to form the given product.

Accepted Answer

The answer of In the following reaction,identify all electron-rich and...

Question 5

Which of the following is the carbocation most likely formed after a 1,2-hydride shift?

Accepted Answer

A)  I
B)  II
C)  III
D)  IV
E)  None of these

Question 6

The two following species can react via an electrophilic addition step.Draw the mechanism arrows for this step,give the expected product,and label the nucleophile and the electrophile.

Accepted Answer

The answer of The two following species can react via...

Question 7

The following carbocation undergoes a 1,2-alkyl shift.Draw the mechanism,and give the products of this shift.

Accepted Answer

The answer of The following carbocation undergoes a 1,2-alkyl shift.Draw...

Question 8

Which of the following is not true about a nucleophile elimination step?

Accepted Answer

A)  A leaving group leaves.
B)  A multiple bond is formed.
C)  Only one product is formed.
D)  Electrons move from electron-rich to electron-poor parts of a molecule.
E)  Two mechanism arrows are used.

Question 9

Indicate which mechanism step is shown below,and draw the expected product(s).

Accepted Answer

Nucleophil...

Question 10

For each of the five following mechanism steps,name the step being shown.Choose from the following: proton transfer,SN2,coordination,heterolysis,E2,nucleophilic addition,nucleophile elimination,electrophilic addition,electrophile elimination,carbocation rearrangement,or none of the above.

Accepted Answer

Nucleophilic additio...

Question 11

Which of the following is not true about Lewis bases?

Accepted Answer

A)  They donate electron density.
B)  They often bear a negative charge.
C)  They attack electron-poor sites.
D)  They tend to be electron rich.
E)  They tend to be electrophiles.

Question 12

Which of the following is an SN2 step? N2 step?   A) I B) II C) III D) IV E) V" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  I
B)  II
C)  III
D)  IV
E)  V

Question 13

The two following molecules can react via a coordination step.Draw the mechanism for this step and the resulting product.Also label the nucleophile and the electrophile.

Accepted Answer

The answer of The two following molecules can react via...

Question 14

Which of the following is not true about Grignard reagents?

Accepted Answer

A)  They include a metal directly bonded to a carbon.
B)  They tend to be electrophiles.
C)  They are useful for forming new carbon-carbon bonds.
D)  They consist of a highly polar bond.
E)  They are organometallic compounds.

Question 15

The two following molecules can react via a nucleophilic addition.Draw the mechanism arrows for this step,and give the products.

Accepted Answer

The answer of The two following molecules can react via...

Question 16

The following mechanism step is ________.

Accepted Answer

A)  Heterolysis
B)  Coordination
C)  Nucleophile elimination
D)  E2
E)  Electrophile elimination

Question 17

Which of the following mechanism steps is most energetically favorable?

Accepted Answer

A)  I
B)  II
C)  III
D)  IV
E)  V

Question 18

The two following species can react via an SN2 mechanism.Fill in the mechanism arrows,and supply the expected products.

Accepted Answer

Question 19

The two following species can react via an SN2 mechanism.Fill in the mechanism arrows,and supply the expected products.

Accepted Answer

Question 20

Butyl lithium reacts with the following acetyl bromide via a nucleophilic addition step.Provide the omitted mechanism arrows,and draw the missing product in the box.

Accepted Answer

The answer of Butyl lithium reacts with the following acetyl...

Exam 9: An Overview of the Most Common Elementary Steps

Which of the following molecules can tautomerize?

Correct AnswerverifiedE

Which of the following is true about spectator ions?

Correct AnswerverifiedShow Answer

What is the most likely mechanism for the following reaction?

Correct AnswerverifiedShow Answer

In the following reaction,identify all electron-rich and electron-poor sites in the starting materials,and supply the missing mechanism arrows required to form the given product.

Correct AnswerverifiedShow Answer

Which of the following is the carbocation most likely formed after a 1,2-hydride shift?

Correct AnswerverifiedShow Answer

The two following species can react via an electrophilic addition step.Draw the mechanism arrows for this step,give the expected product,and label the nucleophile and the electrophile.

Correct AnswerverifiedShow Answer

The following carbocation undergoes a 1,2-alkyl shift.Draw the mechanism,and give the products of this shift.

Correct Answerverified11ea8a0a_3796_8a5b_9fff_7308ac584f55_TB4360_00

Which of the following is not true about a nucleophile elimination step?

Correct AnswerverifiedShow Answer

Indicate which mechanism step is shown below,and draw the expected product(s).

Correct AnswerverifiedNucleophil...View AnswerShow Answer

For each of the five following mechanism steps,name the step being shown.Choose from the following: proton transfer,SN2,coordination,heterolysis,E2,nucleophilic addition,nucleophile elimination,electrophilic addition,electrophile elimination,carbocation rearrangement,or none of the above.

Correct AnswerverifiedNucleophilic additio...View AnswerShow Answer

Which of the following is not true about Lewis bases?

Correct AnswerverifiedShow Answer

Which of the following is an SN2 step?

Correct AnswerverifiedShow Answer

The two following molecules can react via a coordination step.Draw the mechanism for this step and the resulting product.Also label the nucleophile and the electrophile.

Correct AnswerverifiedShow Answer

Which of the following is not true about Grignard reagents?

Correct AnswerverifiedShow Answer

The two following molecules can react via a nucleophilic addition.Draw the mechanism arrows for this step,and give the products.

Correct AnswerverifiedShow Answer

The following mechanism step is ________.

Correct AnswerverifiedShow Answer

Which of the following mechanism steps is most energetically favorable?

Correct AnswerverifiedShow Answer

The two following species can react via an SN2 mechanism.Fill in the mechanism arrows,and supply the expected products.

Correct AnswerverifiedShow Answer

The two following species can react via an SN2 mechanism.Fill in the mechanism arrows,and supply the expected products.

Correct AnswerverifiedShow Answer

Butyl lithium reacts with the following acetyl bromide via a nucleophilic addition step.Provide the omitted mechanism arrows,and draw the missing product in the box.

Correct Answerverified11ea8a0a_3791_331b_9fff_8b6a7bd42bc5_TB4360_00

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Nucleophil...
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For each of the five following mechanism steps,name the step being shown.Choose from the following: proton transfer,S_N2,coordination,heterolysis,E2,nucleophilic addition,nucleophile elimination,electrophilic addition,electrophile elimination,carbocation rearrangement,or none of the above.

Correct Answer
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Nucleophilic additio...
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Which of the following is an S_N2 step?

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The two following species can react via an S_N2 mechanism.Fill in the mechanism arrows,and supply the expected products.

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The two following species can react via an S_N2 mechanism.Fill in the mechanism arrows,and supply the expected products.

Correct Answer
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