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 removes a proton from the protonated alcohol.
E) All of the above
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A) An alkyne is an electron-rich molecule and therefore reacts as a nucleophile.
B) The σ bonds of alkynes are greater in energy than the π bonds and, therefore, are more reactive.
C) Unlike alkenes, alkynes fail to undergo electrophilic addition reactions.
D) When a symmetrical internal alkyne reacts with HBr, two products are formed.
E) Alkynes react as electrophiles, whereas alkenes react as nucleophiles.
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A)
B)
C)
D)
E)
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