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The Diels Alder reaction is a concerted reaction. Define concerted.


A) The product contains a cyclic ring.
B) The diene must be in the s-cis conformation to react.
C) All changes in bonding (bond making and bond breaking) occur simultaneously.
D) It is an endothermic reaction.
E) Both exo and endo products are formed.

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Which of the following diene(s) can undergo the Diels-Alder reaction? Which of the following diene(s) can undergo the Diels-Alder reaction? A) I B) II C) III D) IV E) All of the these


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

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Which diene and dienophile would react to give the following Diels-Alder product? Which diene and dienophile would react to give the following Diels-Alder product?

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Which one of the following dienes is least stable?


A) CH3CH=CHCH=CHCH3
B) CH3CH=CHCH2CH=CH2
C) CH2=CHCH2CH2CH=CH2
D) CH2=CHCH(CH3) CH=CH2
E) CH3CH=C=CHCH2CH3

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Which one of the following represents the HOMO of 1,3,5-hexatriene? Which one of the following represents the HOMO of 1,3,5-hexatriene? 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 statement is NOT true about the Diels-Alder reaction?


A) It is a [4+2] cycloaddition reaction.
B) The diene must be in the s-cis conformation to react.
C) Most Diels-Alder reactions are reversible.
D) It is a sigmatropic rearrangement.
E) Electron donating groups on the diene and electron withdrawing groups on the dienophile favor product formation.

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D

Which of the following indicated C-C bonds is (are) the longest? Which of the following indicated C-C bonds is (are) the longest? A) I B) II C) III D) both I and II


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

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Provide the structure for (S,E)-3-t-butyl-4-methyl-1,4-hexadiene.

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Identify the isolated dienes.


A) 4-methyl-1,3-heptadiene
B) 3-methyl-1,5-heptadiene
C) 2-methyl-2,4-heptadiene
D) 4-methyl-1,4-heptadiene
E) 5-methyl-2,3-heptadiene

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What is the correct classification of the following pericyclic reaction? What is the correct classification of the following pericyclic reaction? A) electrophilic addition B) sigmatropic rearrangement C) cycloaddition D) electrocyclic reaction E) C and D


A) electrophilic addition
B) sigmatropic rearrangement
C) cycloaddition
D) electrocyclic reaction
E) C and D

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Which diene and dienophile would react to give the following Diels-Alder product? Which diene and dienophile would react to give the following Diels-Alder product? A) I B) II C) III D) IV E) V Which diene and dienophile would react to give the following Diels-Alder product? A) I B) II C) III D) IV E) V


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

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Provide the reagents necessary to carry out the following conversion. Provide the reagents necessary to carry out the following conversion.

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1. NBS,hea...

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Predict the major product for the following Diels-Alder reaction. Predict the major product for the following Diels-Alder reaction.

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Which one of the following compounds is not a product of the reaction between 1,3-butadiene and HBr?


A) (S) -3-bromo-1-butene
B) (R) -3-bromo-1-butene
C) (E) -1-bromo-2-butene
D) (Z) -1-bromo-2-butene
E) (Z) -2-bromo-2-butene

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What is the correct classification of the following pericyclic reaction? What is the correct classification of the following pericyclic reaction? A) electrophilic addition B) sigmatropic rearrangement C) cycloaddition D) electrocyclic reaction E) C & D


A) electrophilic addition
B) sigmatropic rearrangement
C) cycloaddition
D) electrocyclic reaction
E) C & D

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D

Predict the major product for the following Diels-Alder reaction. Predict the major product for the following Diels-Alder reaction.

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11ea894b_ad0f_6052_bba7_018e49c7c34d_TB4454_00_TB4454_00

Which one of the following represents the LUMO of 1,3,5-hexatriene? Which one of the following represents the LUMO of 1,3,5-hexatriene? 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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Provide the structure of the 1,4 addition product for the reaction of 1,3-hexadiene with Br2/CCl4.

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Predict the product(s) for the following reaction. Predict the product(s) for the following reaction. A) I B) II C) III D) IV E) both I & III Predict the product(s) for the following reaction. A) I B) II C) III D) IV E) both I & III


A) I
B) II
C) III
D) IV
E) both I & III

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Predict the possible major products for the following reaction. Predict the possible major products for the following reaction.

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