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A pair of enantiomers results from which of these reactions?


A) cyclopentene + cold,dil.KMnO4 →\rightarrow
B) trans-2-butene + Br2 →\rightarrow
C) 1-pentene + HCl →\rightarrow
D) cis-2-butene + D2/Pt →\rightarrow
E) cyclobutene + OsO4,then Na2SO3 →\rightarrow

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Which reaction would yield a racemic product?


A) Cyclopentene + D2/Pt →\rightarrow
B) Cyclopentene + OsO4,then Na2SO3 →\rightarrow
C) Cyclopentene + Br2/H2O →\rightarrow
D) Cyclopentene + cold,dilute KMnO4 →\rightarrow
E) Cyclopentene + dilute H2SO4 →\rightarrow

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A synthetic strategy for converting trans-2-butene into pure cis-2-butene would consist of which of the following?


A) Reaction with H2,Ni2B (P-2)
B) Reaction with i) Br2,CCl4;ii) 2 NaNH2,NH3(l) ;iii) Na,NH3 (l)
C) Reaction with H3O+,heat
D) Reaction with i) Br2,CCl4;ii) 2 NaNH2,NH3(l) ;iii) H2,Ni2B (P-2)
E) None of these will successfully effect the desired transformation.

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Consider the ozonolysis products obtained from all the unbranched and unsymmetrical isomers of heptene.The reaction product in each case would consist of:


A) a single aldehyde.
B) an aldehyde and a ketone.
C) two different ketones.
D) two different aldehydes.
E) a single ketone.

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Draw Fischer projection formula(s)of the major product(s)of the reaction between Z-2-methyl-3-hexene and cold,alkaline KMnO4.

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blured image The reaction takes ...

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Which of these compounds is not formed when gaseous ethene is bubbled into an aqueous solution of bromine,sodium chloride and sodium nitrate?


A) BrCH2CH2Br
B) BrCH2CH2Cl
C) BrCH2CH2OH
D) ClCH2CH2OH
E) BrCH2CH2ONO2

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In general,when the addition of an unsymmetrical electrophilic reagent to an unsymmetrical alkene forms the product predicted by Markovnikov's rule,that occurs because:


A) the product is statistically favored.
B) steric hindrance favors its formation.
C) it is formed via the more/most stable carbocation.
D) it is the more/most stable product.
E) All of the above are reasons.

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How many compounds are possible from the addition of bromine to CH2=CHCH2CH3 (counting stereoisomers separately) ?


A) One
B) Two
C) Three
D) Four
E) Five

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An alkene adds hydrogen in the presence of a catalyst to give 3,4-dimethylhexane.Ozonolysis of the alkene followed by treatment with zinc and acetic acid gives a single organic product.The structure of the alkene is:


A)
An alkene adds hydrogen in the presence of a catalyst to give 3,4-dimethylhexane.Ozonolysis of the alkene followed by treatment with zinc and acetic acid gives a single organic product.The structure of the alkene is: A) B) C) D) E)
B)
An alkene adds hydrogen in the presence of a catalyst to give 3,4-dimethylhexane.Ozonolysis of the alkene followed by treatment with zinc and acetic acid gives a single organic product.The structure of the alkene is: A) B) C) D) E)
C)
An alkene adds hydrogen in the presence of a catalyst to give 3,4-dimethylhexane.Ozonolysis of the alkene followed by treatment with zinc and acetic acid gives a single organic product.The structure of the alkene is: A) B) C) D) E)
D)
An alkene adds hydrogen in the presence of a catalyst to give 3,4-dimethylhexane.Ozonolysis of the alkene followed by treatment with zinc and acetic acid gives a single organic product.The structure of the alkene is: A) B) C) D) E)
E)
An alkene adds hydrogen in the presence of a catalyst to give 3,4-dimethylhexane.Ozonolysis of the alkene followed by treatment with zinc and acetic acid gives a single organic product.The structure of the alkene is: A) B) C) D) E)

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Addition of excess HCl to 2-methyl-3-heptyne would produce: 2-methyl-3,3-dichloroheptane 2-methyl-2,3-dichloroheptane I II 2-methyl-4,4-dichloroheptane 2-methyl-3,4-dichloroheptane III IV 2-methyl-3-chloroheptene V


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

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What would be the major product of the following reaction? What would be the major product of the following reaction? A) Equal amounts of I and II B) Equal amounts of II and III C) Equal amounts of III and IV D) I and II as major products,III and IV as minor products E) All of the above in equal amounts


A) Equal amounts of I and II
B) Equal amounts of II and III
C) Equal amounts of III and IV
D) I and II as major products,III and IV as minor products
E) All of the above in equal amounts

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What is the major product of the following reaction sequence? What is the major product of the following reaction sequence? A) B) C) D) E) None of the above


A)
What is the major product of the following reaction sequence? A) B) C) D) E) None of the above
B)
What is the major product of the following reaction sequence? A) B) C) D) E) None of the above
C)
What is the major product of the following reaction sequence? A) B) C) D) E) None of the above
D)
What is the major product of the following reaction sequence? A) B) C) D) E) None of the above
E) None of the above

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Neutral divalent carbon compounds are called ___________.

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What is the major product for the following reaction? What is the major product for the following reaction? A) B) C) D) E) More than one of the above


A)
What is the major product for the following reaction? A) B) C) D) E) More than one of the above
B)
What is the major product for the following reaction? A) B) C) D) E) More than one of the above
C)
What is the major product for the following reaction? A) B) C) D) E) More than one of the above
D)
What is the major product for the following reaction? A) B) C) D) E) More than one of the above
E) More than one of the above

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What is the major product for the following reaction? What is the major product for the following reaction? A) B) C) D) E)


A)
What is the major product for the following reaction? A) B) C) D) E)
B)
What is the major product for the following reaction? A) B) C) D) E)
C)
What is the major product for the following reaction? A) B) C) D) E)
D)
What is the major product for the following reaction? A) B) C) D) E)
E)
What is the major product for the following reaction? A) B) C) D) E)

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Treating 1-methylcyclohexene with HCl would yield primarily which of these? Treating 1-methylcyclohexene with HCl would yield primarily which of these? A) I B) II C) III D) IV E) V


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

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What is the major product of the following reaction sequence? What is the major product of the following reaction sequence? A) B) C) D) E)


A)
What is the major product of the following reaction sequence? A) B) C) D) E)
B)
What is the major product of the following reaction sequence? A) B) C) D) E)
C)
What is the major product of the following reaction sequence? A) B) C) D) E)
D)
What is the major product of the following reaction sequence? A) B) C) D) E)
E)
What is the major product of the following reaction sequence? A) B) C) D) E)

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Provide a mechanistic explanation for the following observation: The same major product is obtained when 2-ethyl-1-hexene and 3-methyl-2-heptene are allowed to react with HCl.

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blured image Both alkenes are unsymmetrically substi...

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Ozonolysis of compound Z yields the products shown below.What is the structure of Z? Ozonolysis of compound Z yields the products shown below.What is the structure of Z? A) I B) II C) III D) IV E) V


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

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What is the major product for the following reaction? What is the major product for the following reaction? A) B) C) D) E) None of the above


A)
What is the major product for the following reaction? A) B) C) D) E) None of the above
B)
What is the major product for the following reaction? A) B) C) D) E) None of the above
C)
What is the major product for the following reaction? A) B) C) D) E) None of the above
D)
What is the major product for the following reaction? A) B) C) D) E) None of the above
E) None of the above

Correct Answer

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