Question 1

Can one distinguish among the three isomeric xylenes using 13C NMR? Explain.

Accepted Answer

Yes. In the proton decoupled ¹³C...

Question 2

Which of the following compounds reacts most slowly during nitration?

Accepted Answer

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

Question 3

Give the best product for the following reaction.

Accepted Answer

The answer of Give the best product for the following...

Question 4

Identify the best product for the following reaction.

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 5

Which of the following is most likely to be the first step in the general mechanism for electrophilic substitution reactions?

Accepted Answer

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

Question 6

Give the product(s)for the following reaction.

Accepted Answer

The answer of Give the product(s)for the following reaction. ...

Question 7

Bromination of benzene requires a Lewis acid catalyst while bromination of cyclohexene does not. Explain this difference in reactivity.

Accepted Answer

An alkene is a better nucleoph...

Question 8

Draw the four major resonance structures of the carbocation intermediate in the reaction of anisole with HNO3/H2SO4 to yield p-nitroanisole.

Accepted Answer

Question 9

How many signals does one expect in the proton decoupled 13C NMR spectrum of o-xylene?

Accepted Answer

A)  8
B)  6
C)  4
D)  3
E)  2

Question 10

Name the following structure.

Accepted Answer

A)  2-chlorobenzoic acid
B)  3-chlorobenzoic acid
C)  2-chlorobenzaldehyde
D)  3-chlorobenzaldehyde
E)  3-chloroacetophenone

Question 11

Draw p-aminobenzoic acid.

Accepted Answer

The answer of Draw p-aminobenzoic acid....

Question 12

What is the major product of the following reaction?

Accepted Answer

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

Question 13

What is the name of the following compound?

Accepted Answer

A)  p-dichlorobenzene
B)  1,4-dichlorobenzene
C)  phenyldichloride
D)  A and B
E)  B and C

Question 14

Which of the following substituents acts as a moderate activator and o/p director in electrophilic aromatic substitution reactions?

Accepted Answer

A)  -Br
B)  -SO3H
C)  -CO2H
D)  -NHCOR
E)  -CHO

Question 15

Provide a detailed, stepwise mechanism for the following reaction.

Accepted Answer

The answer of Provide a detailed, stepwise mechanism for the...

Question 16

Which reagent is least likely to be used in the conversion shown? 2Cr2O7 B) HNO3 C) Sn D) NaNO2 E) HCl" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  Na2Cr2O7
B)  HNO3
C)  Sn
D)  NaNO2
E)  HCl

Question 17

What sequence of reagents can be used to make m-butylbenzoic acid from benzene?

Accepted Answer

The answer of What sequence of reagents can be used...

Question 18

Which of the following substrates is an electron withdrawing group overall?

Accepted Answer

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

Question 19

Draw the three major resonance structures of the carbocation intermediate in the reaction of acetophenone with HNO3/H2SO4 to yield o-nitroacetophenone. Circle the resonance form which is less stable than the other two.

Accepted Answer

Question 20

What is the major product of the following reaction?

Accepted Answer

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

Exam 19: Reactions of Benzene and Substituted Benzenes

What is the name of the following compound?

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Give the product(s)for the following reaction.

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Draw the three major resonance structures of the carbocation intermediate in the reaction of acetophenone with HNO3/H2SO4 to yield o-nitroacetophenone. Circle the resonance form which is less stable than the other two.

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Draw the four major resonance structures of the carbocation intermediate in the reaction of anisole with HNO3/H2SO4 to yield p-nitroanisole.

Correct AnswerverifiedShow Answer

Bromination of benzene requires a Lewis acid catalyst while bromination of cyclohexene does not. Explain this difference in reactivity.

Correct AnswerverifiedAn alkene is a better nucleoph...View AnswerShow Answer

Which of the following compounds reacts most slowly during nitration?

Correct AnswerverifiedShow Answer

Name the following structure.

Correct AnswerverifiedShow Answer

What sequence of reagents can be used to make m-butylbenzoic acid from benzene?

Correct AnswerverifiedShow Answer

What is the major product of the following reaction?

Correct AnswerverifiedShow Answer

Which of the following substituents acts as a moderate activator and o/p director in electrophilic aromatic substitution reactions?

Correct AnswerverifiedShow Answer

What is the major product of the following reaction?

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Draw p-aminobenzoic acid.

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Which reagent is least likely to be used in the conversion shown?

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Give the best product for the following reaction.

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Which of the following substrates is an electron withdrawing group overall?

Correct AnswerverifiedShow Answer

Which of the following is most likely to be the first step in the general mechanism for electrophilic substitution reactions?

Correct AnswerverifiedShow Answer

How many signals does one expect in the proton decoupled 13C NMR spectrum of o-xylene?

Correct AnswerverifiedShow Answer

Provide a detailed, stepwise mechanism for the following reaction.

Correct AnswerverifiedShow Answer

Identify the best product for the following reaction.

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Can one distinguish among the three isomeric xylenes using 13C NMR? Explain.

Correct AnswerverifiedYes. In the proton decoupled 13C...View AnswerShow Answer

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Draw the three major resonance structures of the carbocation intermediate in the reaction of acetophenone with HNO₃/H₂SO₄ to yield o-nitroacetophenone. Circle the resonance form which is less stable than the other two.

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Draw the four major resonance structures of the carbocation intermediate in the reaction of anisole with HNO₃/H₂SO₄ to yield p-nitroanisole.

Correct Answer
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Correct Answer
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An alkene is a better nucleoph...
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Correct Answer
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Correct Answer
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Correct Answer
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How many signals does one expect in the proton decoupled ¹³C NMR spectrum of o-xylene?

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Can one distinguish among the three isomeric xylenes using ¹³C NMR? Explain.

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Yes. In the proton decoupled ¹³C...
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