题目内容

Which of the following compounds is the major product when 1-hexyne is treated with excess HBr? ()

A. 1,1-dibromohexane
B. 1,1-dibromohexene
C. 1,2-dibromohexene
D. 1,2-dibromohexane
E. 2,2-dibromohexane

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A mixture of 1-heptyne, 2-heptyne, and 3-heptyne was hydrogenated in the presence of a platinum catalyst until hydrogen uptake ceased. If one assumes that the hydrogenation went to completion, how many distinct seven-carbon hydrocarbons were produced?()

A. 1
B. 2
C. 3
D. 6
E. 8

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Which of the following compounds will react most rapidly with HCl?()

A. 5-methyl-1-hexene
B. 4-methyl-1-hexene
C. E-5-methyl-2-hexene
D. E-2-methyl-3-hexene
E. 2-methyl-2-hexene

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What is the major product from the acid-catalyzed hydration of 2-methyl-2-pentene? ()

A. 2-methylpentane
B. 2-methyl-1-pentanol
C. 2-methyl-2-pentanol
D. 2-methyl-3-pentanol
E. 1-methoxypentane

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Identify the true statements in the mechanism in the addition of water to an alkene. ()

A. The addition of the electrophile is a slow step.
B. The addition of the nucleophile is a fast step.
C. A carbocation is formed as an intermediate.
D. Water abstracts the extra proton from the protonated alcohol.
E. All of the above

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Which of the following compounds is the major product when 1-hexyne is treated with excess HBr? ()

A. 1,1-dibromohexane B. 1,1-dibromohexene C. 1,2-dibromohexene D. 1,2-dibromohexane E. 2,2-dibromohexane

A mixture of 1-heptyne, 2-heptyne, and 3-heptyne was hydrogenated in the presence of a platinum catalyst until hydrogen uptake ceased. If one assumes that the hydrogenation went to completion, how many distinct seven-carbon hydrocarbons were produced?()

Which of the following compounds will react most rapidly with HCl?()

What is the major product from the acid-catalyzed hydration of 2-methyl-2-pentene? ()

Identify the true statements in the mechanism in the addition of water to an alkene. ()

A. 1,1-dibromohexane
B. 1,1-dibromohexene
C. 1,2-dibromohexene
D. 1,2-dibromohexane
E. 2,2-dibromohexane