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


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

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Which diene would be least reactive toward Diels-Alder addition of maleic anhydride? Which diene would be least reactive toward Diels-Alder addition of maleic anhydride? A) I B) II C) III D) IV E) V


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

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Which of these dienes can undergo the Diels-Alder reaction?


A) 1,3-Pentadiene
B) 1,4-Pentadiene
C) 1,2-Butadiene
D) 1,4-Cyclohexadiene
E) All of the above can undergo the Diels-Alder reaction

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Which would be the best synthesis? Which would be the best synthesis? A) B) C) D) E)


A)
Which would be the best synthesis? A) B) C) D) E)
B)
Which would be the best synthesis? A) B) C) D) E)
C)
Which would be the best synthesis? A) B) C) D) E)
D)
Which would be the best synthesis? A) B) C) D) E)
E)
Which would be the best synthesis? A) B) C) D) E)

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Conjugated dienes routinely undergo 1,2 and 1,4 addition reactions with a variety of electrophilic reagents;this suggests that ___________ are likely intermediates during these reactions.

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allylic ca...

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Select the structure of the conjugated diene. Select the structure of the conjugated diene. A) I B) II C) III D) IV E) V


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

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Which of the following would afford a synthesis of the following compound? Which of the following would afford a synthesis of the following compound? A) I B) II C) III D) IV E) None of these Which of the following would afford a synthesis of the following compound? A) I B) II C) III D) IV E) None of these


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

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Which of the following dienes would you expect to be the most stable?


A) CH3CH2CH=CHCH2CH=CHCH3
B) CH3CH=CHCH=CHCH2CH3
C) CH2=CHCH2CH2CH2CH=CH2
D) CH2=CHCH=CHCH2CH2CH3
E) CH3CH=C(CH3) CH=CHCH2CH3

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There are three types of polyenes (molecules containing two or more double bonds).They are: _________________.

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conjugated...

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Which diene and dienophile would you use to prepare the following molecule using a Diels- Alder cycloaddition reaction: Which diene and dienophile would you use to prepare the following molecule using a Diels- Alder cycloaddition reaction:

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Which of these conjugated dienes can undergo a Diels-Alder reaction? Which of these conjugated dienes can undergo a Diels-Alder reaction? A) I B) II C) III D) IV E) All of the above


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

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From the standpoint of reactivity,which is the poorest choice of dienophile to react with 2,3-dimethyl-1,3-butadiene in a Diels-Alder reaction? From the standpoint of reactivity,which is the poorest choice of dienophile to react with 2,3-dimethyl-1,3-butadiene in a Diels-Alder reaction? A) I B) II C) III D) IV E) V


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

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Which of the following dieneophiles is most reactive in a Diels-Alder reaction: Which of the following dieneophiles is most reactive in a Diels-Alder reaction: A) I B) II C) III D) IV E) V


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

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Which alkene would you expect to be most stable?


A) CH2=CHCH2CH2CH=CH2
B)
Which alkene would you expect to be most stable? A) CH<sub>2</sub>=CHCH<sub>2</sub>CH<sub>2</sub>CH=CH<sub>2</sub> B) C) D) E)
C)
Which alkene would you expect to be most stable? A) CH<sub>2</sub>=CHCH<sub>2</sub>CH<sub>2</sub>CH=CH<sub>2</sub> B) C) D) E)
D)
Which alkene would you expect to be most stable? A) CH<sub>2</sub>=CHCH<sub>2</sub>CH<sub>2</sub>CH=CH<sub>2</sub> B) C) D) E)
E)
Which alkene would you expect to be most stable? A) CH<sub>2</sub>=CHCH<sub>2</sub>CH<sub>2</sub>CH=CH<sub>2</sub> B) C) D) E)

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Which diene and dienophile would you choose to synthesize the following compound? Which diene and dienophile would you choose to synthesize the following compound? A) I B) II C) III D) IV E) None of these


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

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The accompanying diagram implies that: The accompanying diagram implies that: A) the formation of B from A would be favored at high temperature. B) the more stable product forms more rapidly from the intermediate species. C) the formation of B from the intermediate is the rate-limiting step in the transformation of A into B D) the formation of B from A is not a concerted reaction. E) All of the above statements are true.


A) the formation of B from A would be favored at high temperature.
B) the more stable product forms more rapidly from the intermediate species.
C) the formation of B from the intermediate is the rate-limiting step in the transformation of A into B
D) the formation of B from A is not a concerted reaction.
E) All of the above statements are true.

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An unsaturated product results from the reaction of cyclohexene with which of these?


A) Br2/CCl4 at 25 °\degree C
B) NBS/CCl4,ROOR
C) HCl,ROOR
D) HCl,no peroxides
E) More than one of these

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Complete the following sequence of reactions,giving structural details of all key intermediates. Complete the following sequence of reactions,giving structural details of all key intermediates.

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Which is an untrue statement concerning the Diels-Alder reaction?


A) The reaction is a syn addition.
B) The diene must be in the s-cis conformation to react.
C) Most Diels-Alder reactions are reversible.
D) Generally,the adduct formed most rapidly is the exo product.
E) Electron donating groups on the diene and electron withdrawing groups on the dieneophile favor adduct formation.

Correct Answer

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Which is the major product of the following reaction? Which is the major product of the following reaction? A) I B) II C) III D) IV E) V


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

Correct Answer

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