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What is the major organic product of the following reaction? What is the major organic product of the following reaction? A) I B) II C) III D) IV


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

E) None of the above
F) B) and C)

Correct Answer

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Rank the following dienes in order of increasing reactivity in a Diels-Alder reaction, listing the least reactive first. Rank the following dienes in order of increasing reactivity in a Diels-Alder reaction, listing the least reactive first. A) I< II < III B) III < I < II C) II < I < III D) I < III < II


A) I< II < III
B) III < I < II
C) II < I < III
D) I < III < II

E) None of the above
F) A) and D)

Correct Answer

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What is the definition of a resonance structure?


A) Compounds with the same molecular formula.
B) Compounds with different carbon frameworks.
C) Structures that differ only in the placement of π and nonbonding electrons.
D) Structures that differ only in the location of bonds.

E) B) and C)
F) A) and D)

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Which of the following compounds is the least reactive dienophile in a Diels-Alder reaction? Which of the following compounds is the least reactive dienophile in a Diels-Alder reaction? A) I B) II C) III D) IV


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

E) B) and C)
F) A) and B)

Correct Answer

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What is the major organic product of the following reaction? What is the major organic product of the following reaction? A) I B) II C) III D) IV


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

E) A) and B)
F) A) and C)

Correct Answer

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Which of the following is (are) conjugated dienes? Which of the following is (are) conjugated dienes? A) Only I B) Only II C) Only I and II D) I, II, and III


A) Only I
B) Only II
C) Only I and II
D) I, II, and III

E) All of the above
F) B) and C)

Correct Answer

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What is (are) the major product(s) of the following reaction? What is (are) the major product(s) of the following reaction? A) Only I B) Only II and IV C) Only I and III D) Only I, II, and III


A) Only I
B) Only II and IV
C) Only I and III
D) Only I, II, and III

E) All of the above
F) A) and B)

Correct Answer

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B

Which of the following dienes contain conjugated double bonds? Which of the following dienes contain conjugated double bonds? A) Only I and II B) Only II and III C) Only I and III D) Only II and IV


A) Only I and II
B) Only II and III
C) Only I and III
D) Only II and IV

E) A) and C)
F) All of the above

Correct Answer

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What diene and dienophile are used in a Diels-Alder reaction to prepare the following compound? What diene and dienophile are used in a Diels-Alder reaction to prepare the following compound? A) I B) II C) III D) IV


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

E) All of the above
F) A) and C)

Correct Answer

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Which of the following is an example of a bridged bicyclic system? Which of the following is an example of a bridged bicyclic system? A) I B) II C) III D) IV


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

E) None of the above
F) B) and C)

Correct Answer

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Which of the following statements about the Diels-Alder reaction is true?


A) The diene can react only when it adopts the s-trans conformation.
B) Electron-withdrawing substituents in the diene increase reaction rate.
C) Electron-donating substituents in the dienophile increase the reaction rate.
D) The stereochemistry of the dienophile is retained in the product.

E) All of the above
F) A) and B)

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What is (are) the major product(s) of the following reaction? What is (are) the major product(s) of the following reaction? A) Only I B) Only I and III C) Only II and IV D) Only I, II, and III


A) Only I
B) Only I and III
C) Only II and IV
D) Only I, II, and III

E) B) and D)
F) None of the above

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D

Which of the following is the least reactive diene in a Diels-Alder reaction? Which of the following is the least reactive diene in a Diels-Alder reaction? A) I B) II C) III D) IV


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

E) A) and B)
F) A) and C)

Correct Answer

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Which of the following conjugated dienes represent two conformations? Which of the following conjugated dienes represent two conformations? A) Only I and II B) Only I and III C) Only II and III D) None of the choices


A) Only I and II
B) Only I and III
C) Only II and III
D) None of the choices

E) B) and C)
F) A) and D)

Correct Answer

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Rank the following anions from most to least stable, listing the most stable first. Rank the following anions from most to least stable, listing the most stable first. A) I> II > III B) III > II > I C) I > III > II D) III > I > II


A) I> II > III
B) III > II > I
C) I > III > II
D) III > I > II

E) None of the above
F) B) and D)

Correct Answer

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B

What is the major organic product of the following reaction? What is the major organic product of the following reaction? A) Only I B) Only II C) Only III D) Only I and II


A) Only I
B) Only II
C) Only III
D) Only I and II

E) A) and C)
F) A) and B)

Correct Answer

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What is the major organic product of the following reaction? What is the major organic product of the following reaction? A) I B) II C) III D) IV


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

E) A) and D)
F) A) and B)

Correct Answer

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What is the thermodynamic product obtained from the addition of 1 equivalent of HBr to 1,3-butadiene?


A) 3-Bromo-1-butene
B) 1-Bromo-2-butene
C) 2-Bromo-2-butene
D) 2-Bromo-1-butene

E) C) and D)
F) A) and C)

Correct Answer

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Which of the following is not a feature of the Diels-Alder reaction?


A) They are initiated by peroxides.
B) They form new six-membered rings.
C) Three π bonds break.
D) They are concerted.

E) A) and B)
F) C) and D)

Correct Answer

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Why would the compound below not react with a dienophile in a Diels-Alder reaction? Why would the compound below not react with a dienophile in a Diels-Alder reaction? A) The compound is not a conjugated diene. B) There are no electron withdrawing groups on the compound. C) There are no electron donating groups on the compound. D) The compound cannot adopt the s-cis conformation.


A) The compound is not a conjugated diene.
B) There are no electron withdrawing groups on the compound.
C) There are no electron donating groups on the compound.
D) The compound cannot adopt the s-cis conformation.

E) A) and D)
F) A) and C)

Correct Answer

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