3.What is the carbon nucleophile which attacks molecular bromine in the acid-catalyzed a-bromination of a ketone?
(A) an enolate
(D) a carbocation
(B) a Grignard reagent
(C) an acetylide

(E) an enol

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統計： A(0), B(1), C(0), D(0), E(0) #3829702