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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) None of the above
F) All of the above

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Which of the following statements about kinetic vs.thermodynamic products is true?


A) The product that is formed faster is the thermodynamic product.
B) The kinetic product predominates at low temperature.
C) The product that predominates at equilibrium is the kinetic product.
D) The thermodynamic product is less stable.

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

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What is the reactive intermediate in the reaction of 1,3-diene with HBr,resulting in 1,4-addition?


A) Allylic radical
B) Cyclic bromonium
C) Dienophile
D) Allylic carbocation

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

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Rank the following dienes in order of decreasing heat of hydrogenation,putting the diene with the highest heat of hydrogenation first. Rank the following dienes in order of decreasing heat of hydrogenation,putting the diene with the highest heat of hydrogenation first.   A) I > II > III B) III > II > I C) II > I > III D) III > I > II


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

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

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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) B) and D)
F) All of the above

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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) None of the above
F) C) and D)

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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) 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 D)
F) B) and C)

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Which of the following compound absorbs UV light at the longest wavelength? Which of the following compound absorbs UV light at the longest wavelength?   A) I B) II C) III D) IV


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

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

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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 D)
F) A) and B)

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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) 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 D)
F) A) and C)

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

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Which of the following compounds is the most reactive dienophile in a Diels-Alder reaction? Which of the following compounds is the most 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 C)

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Which of the following dienes contain isolated double bonds? Which of the following dienes contain isolated 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) None of the above
F) All of the above

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