Which of the following statements correctly describes the general reactivity of alkynes? ()
An alkyne is an electron-rich molecule and therefore reacts as a nucleophile.
B. The σ bonds of alkynes are higher in energy than the π bonds and are thus more reactive.
C. Unlike alkenes, alkynes fail to undergo electrophilic addition reactions.
D. Alkynes are generally more reactive than alkenes.
E. Alkynes react as electrophiles, whereas alkenes react as nucleophiles.
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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?()
A. 1
B. 2
C. 3
D. 6
E. 8
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
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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