A) In which of the following addition reactions is a carbocation rearrangement p

Question

A) In which of the following addition reactions is a carbocation rearrangement possible? Check all that apply.

a. Oxymercuration-demercuration
b. Dihydroxylation
c. Hydroboration-oxidation
d. Hydrohalogenation
e. Hydrogenation
f. Acid-catalyzed hydration
g. Halogenation

B) Which of the following reactions gives exclusively syn addition?

a. Acid-catalyzed addition of water
b. Reaction with HBr
c. Bromination
d. Dihydroxylation with osmium tetroxide
e. Oxymercuration-demercuration
f. Hydrogenation with a Pt catalyst
g. Hydroboration-oxidation
h. Formation of a chlorohydrin with Cl2 and water

Explanation / Answer

Question A

d .Hydrohalogenation

f. Acid-catalyzed hydration

Question B

d. Dihydroxylation with osmium tetroxide

f. Hydrogenation with a Pt catalyst

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