What is the majour product from the reaction of 2-butene with MnO4-/H2O?

a. 1-butanol
b. butanal
c. 2-butanol
d. 1,3-butandiol
e. 2,3-butandiol

Answer:
The reaction is called hydroxylation. It is an oxidation reaction. It is carried out in presence of MnO4- in a syn fashion. There is no rearrangement involved, the original carbon skeleton will be retained. So the answer is (e).

Also, it is an oxidation reaction.
it'll definitely form a glycol
so the answer is e) 2,3-butandiol

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