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SN2 reactions are nucleophilic substitution reactions for which the rate determining step is bimolecular.

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Predict the major product for the reaction: 1-butene + HI →


A) CH2ICH2CH2CH3
B) CH2ICH=CHCH3
C) CH2=CICH2CH3
D) CH3CHICH2CH3
E) CH3CI2CH2CH3

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Which of the following are nucleophiles? I.CH3COCH3 II.CH3Br III.CH3CH2C≡C-


A) I
B) II
C) III
D) I + II
E) I + III

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Predict major products for chlorination of the following three aromatic compounds: Predict major products for chlorination of the following three aromatic compounds: A) B) C) D) E)


A) Predict major products for chlorination of the following three aromatic compounds: A) B) C) D) E)
B) Predict major products for chlorination of the following three aromatic compounds: A) B) C) D) E)
C) Predict major products for chlorination of the following three aromatic compounds: A) B) C) D) E)
D) Predict major products for chlorination of the following three aromatic compounds: A) B) C) D) E)
E) Predict major products for chlorination of the following three aromatic compounds: A) B) C) D) E)

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Classify the following reaction steps as initiation,propagation or termination. A: Br-Br → 2 Br∙ B: H3CH2C∙ + Br∙ → CH3CH2Br C: 2 H3CH2C∙ → CH3CH2CH2CH3


A) Step A is initiation and steps B and C are propagation
B) Steps A and B are initiation and step C is termination
C) Step A is initiation,step B is termination and step C is propagation
D) Step A is initiation,step B is propagation and step C is termination
E) Step A is initiation and steps B and C are termination

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Which of the following steps can be found in any of the polymerization mechanisms you learned? I.initiation II.condensation III.propagation IV.dehydrohalogenation V.rearrangement


A) I,III,V.
B) II,III and IV
C) III,IV,and V
D) I,II,and III
E) II,III,and V

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When (CH3) 3CBr reacts with CH3ONa in methanol,two products are formed: a major one is an alkene and minor one is an ether.Identify the two products and by what mechanism(s) they are formed?


A) When (CH<sub>3</sub>) <sub>3</sub>CBr reacts with CH<sub>3</sub>ONa in methanol,two products are formed: a major one is an alkene and minor one is an ether.Identify the two products and by what mechanism(s) they are formed? A) B) C) D) E)
B) When (CH<sub>3</sub>) <sub>3</sub>CBr reacts with CH<sub>3</sub>ONa in methanol,two products are formed: a major one is an alkene and minor one is an ether.Identify the two products and by what mechanism(s) they are formed? A) B) C) D) E)
C) When (CH<sub>3</sub>) <sub>3</sub>CBr reacts with CH<sub>3</sub>ONa in methanol,two products are formed: a major one is an alkene and minor one is an ether.Identify the two products and by what mechanism(s) they are formed? A) B) C) D) E)
D) When (CH<sub>3</sub>) <sub>3</sub>CBr reacts with CH<sub>3</sub>ONa in methanol,two products are formed: a major one is an alkene and minor one is an ether.Identify the two products and by what mechanism(s) they are formed? A) B) C) D) E)
E) When (CH<sub>3</sub>) <sub>3</sub>CBr reacts with CH<sub>3</sub>ONa in methanol,two products are formed: a major one is an alkene and minor one is an ether.Identify the two products and by what mechanism(s) they are formed? A) B) C) D) E)

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Complete the following reaction: NH3 + CH3Br →


A) CH4 + NH2Br
B) CH2=NH + H2 + HBr
C) CH3NH2 + NH4+Br-
D) CH3NH3+Br-
E) There is no reaction.

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Which reagents would you choose to carry out the following transformations? I.Which reagents would you choose to carry out the following transformations? I. II. III. A) Reaction I use KO<sup>t</sup>Bu Reaction II use MeOH Reaction III use NaOCH(CH<sub>3</sub>) <sub>2</sub> B) Reaction I use NaOMe Reaction II use MeOH Reaction III use NaOC(CH<sub>3</sub>) <sub>3</sub> C) Reaction I use NaOMe Reaction II use MeOH Reaction III use NaOMe D) Reaction I use KO<sup>t</sup>Bu Reaction II use HC(=O) H Reaction III use NaOCH(CH<sub>3</sub>) <sub>2</sub> E) Reaction I use KO<sup>t</sup>Bu Reaction II use Na<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub> or K<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub> Reaction III use NaOCH(CH<sub>3</sub>) <sub>2</sub> II. Which reagents would you choose to carry out the following transformations? I. II. III. A) Reaction I use KO<sup>t</sup>Bu Reaction II use MeOH Reaction III use NaOCH(CH<sub>3</sub>) <sub>2</sub> B) Reaction I use NaOMe Reaction II use MeOH Reaction III use NaOC(CH<sub>3</sub>) <sub>3</sub> C) Reaction I use NaOMe Reaction II use MeOH Reaction III use NaOMe D) Reaction I use KO<sup>t</sup>Bu Reaction II use HC(=O) H Reaction III use NaOCH(CH<sub>3</sub>) <sub>2</sub> E) Reaction I use KO<sup>t</sup>Bu Reaction II use Na<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub> or K<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub> Reaction III use NaOCH(CH<sub>3</sub>) <sub>2</sub> III. Which reagents would you choose to carry out the following transformations? I. II. III. A) Reaction I use KO<sup>t</sup>Bu Reaction II use MeOH Reaction III use NaOCH(CH<sub>3</sub>) <sub>2</sub> B) Reaction I use NaOMe Reaction II use MeOH Reaction III use NaOC(CH<sub>3</sub>) <sub>3</sub> C) Reaction I use NaOMe Reaction II use MeOH Reaction III use NaOMe D) Reaction I use KO<sup>t</sup>Bu Reaction II use HC(=O) H Reaction III use NaOCH(CH<sub>3</sub>) <sub>2</sub> E) Reaction I use KO<sup>t</sup>Bu Reaction II use Na<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub> or K<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub> Reaction III use NaOCH(CH<sub>3</sub>) <sub>2</sub>


A) Reaction I use KOtBu
Reaction II use MeOH
Reaction III use NaOCH(CH3) 2
B) Reaction I use NaOMe
Reaction II use MeOH
Reaction III use NaOC(CH3) 3
C) Reaction I use NaOMe
Reaction II use MeOH
Reaction III use NaOMe
D) Reaction I use KOtBu
Reaction II use HC(=O) H
Reaction III use NaOCH(CH3) 2
E) Reaction I use KOtBu
Reaction II use Na2Cr2O7 or K2Cr2O7
Reaction III use NaOCH(CH3) 2

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Synthesis of alkanes from alkyl halides is a typical example of E2 reaction.

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Identify the product for the following reaction: Identify the product for the following reaction: A) 3-methyl-1-pentene B) 3-methyl-2-pentene C) 3-methyl-1-pentane D) 3-methyl-1-tert-butylpentante E) 3-methylpentane


A) 3-methyl-1-pentene
B) 3-methyl-2-pentene
C) 3-methyl-1-pentane
D) 3-methyl-1-tert-butylpentante
E) 3-methylpentane

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The rate of E2 reaction between an alkyl halide RX and a base B is given by the following expression (k is a rate constant) :


A) k[RX]
B) k[B]
C) k[RX][B]
D) k[RX]2
E) k[RX]2[B]

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Which of the following groups would be ortho,para directors in electrophilic aromatic substitution? I.-CN II.-SO3H III.-NH2 IV.-OH V.-Br


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

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Finish the sentence: "Elimination reactions...


A) ...can follow two different mechanisms."
B) ...do not compete with other reaction types."
C) ...usually give a saturated product."
D) ...always give only one product."
E) ...have only one mechanistic path."

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