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What is the major elimination product obtained from the following reaction? What is the major elimination product obtained from the following reaction? A) I B) II C) III D) IV


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

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

Correct Answer

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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


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

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

Correct Answer

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


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

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

Correct Answer

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Which of the following statements about an E1 mechanism is not true?


A) It is a two-step process and has the same first step as an SN1 mechanism.
B) It involves the formation of a carbocation from eliminating a good leaving group.
C) A common competing reaction is rearrangement of a less stable carbocation to a more stable carbocation.
D) The loss of a proton by the carbocation is a slow step.

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

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How many different E2 products can form from the dehydrohalogenation of 2-bromobutane?


A) 1
B) 2
C) 3
D) 4

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

Correct Answer

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Which of the following is the most reactive substrate in an E1 reaction? Which of the following is the most reactive substrate in an E1 reaction? A) I B) II C) III D) IV


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

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

Correct Answer

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What is the major elimination product obtained from the following reaction? What is the major elimination product obtained from the following reaction? 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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What is the product of the following reaction? What is the 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) None of the above

Correct Answer

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Which of the following statements about an E1 mechanism is not true?


A) The reaction is fastest with tertiary alkyl halides.
B) A better leaving group makes the reaction rate increase.
C) The reaction follows first-order kinetics.
D) Stronger bases favor the E1 reaction.

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

Correct Answer

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What is the major elimination product in the reaction of 1-bromobutane with potassium tert-butoxide in tert-butanol?


A) cis-2-Butene
B) 1-Butene
C) trans-2-Butene
D) Butanol

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

Correct Answer

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


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

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

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Which of the following is most likely to react as a nucleophile rather than a base? KOC(CH3) 3CH3COO−DBUDBN I  II  III  IV \begin{array} { c c c c } \mathrm { KOC } \left( \mathrm { CH } _ { 3 } \right) _ { 3 } & \mathrm { CH } _ { 3 } \mathrm { COO } ^ { - } & \mathrm { DBU } & \mathrm { DBN } \\\text { I } & \text { II } & \text { III } & \text { IV }\end{array}


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

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

Correct Answer

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Which of the labeled protons in the compound below is most readily abstracted under E2 conditions? Which of the labeled protons in the compound below is most readily abstracted under E2 conditions? A) H<sub>a</sub> B) H<sub>b</sub> C) H<sub>c</sub> D) H<sub>d</sub>


A) Ha
B) Hb
C) Hc
D) Hd

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

Correct Answer

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What is the major elimination product obtained from the following reaction? What is the major elimination product obtained from the following reaction? A) I B) II C) III D) IV


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

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

Correct Answer

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Which of the following is the dihalide that can be used to prepare the alkyne below? Which of the following is the dihalide that can be used to prepare the alkyne below? A) I and II B) II and III C) I and III D) I, II and III


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

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

Correct Answer

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Which of the following is the dihalide that can be used to prepare the alkyne below? Which of the following is the dihalide that can be used to prepare the alkyne below? A) Only I B) Only II C) Only III D) II and III


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

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

Correct Answer

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Consider the following E2 reaction. What rate equation would be observed for this reaction? CH3CH2CH2Br+KOC⊕⊖(CH2) 3⟶CH3CH=CH2+KBr+\mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { CH } _ { 2 } \mathrm { Br } + \stackrel { \oplus \ominus } { \mathrm { KOC } } \left( \mathrm { CH } _ { 2 } \right) _ { 3 } \longrightarrow \mathrm { CH } _ { 3 } \mathrm { CH } = \mathrm { CH } _ { 2 } + \mathrm { KBr } ^ { + }


A) Rate = k[CH3CH2CH2Br]
B) Rate = k[CH3CH2CH2Br][KOC(CH3) 3]
C) Rate = k[CH3CH2CH2Br][KOC(CH3) 3]2
D) Rate = k[CH3CH2CH2Br]2[KOC(CH3) 3]

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

Correct Answer

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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


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

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

Correct Answer

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Which of the following represents the rate law for an E2 reaction?


A) Rate = k[alkyl halide]
B) Rate = k[alkyl halide][base]
C) Rate = k[alkyl halide]2
D) Rate = k[base]2

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

Correct Answer

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Which of the following statements about the mechanism of an E2 reaction is true?


A) All bonds are broken and formed in multiple steps.
B) The reaction is not concerted.
C) Entropy favors the reactants of an E2 reaction.
D) Entropy favors the products of an E2 reaction.

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

Correct Answer

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