Quiz | Reactions of Alkenes

1

Which of the following conditions accomplish a Markovnikov addition of water to alkenes?

Hydroboration - oxidation

Water in acid

OsO4, H2S

KMnO4, H2O

2

Which of the following additions to alkenes is syn?

Hydroboration - oxidation

Addition of H2

Dihydroxylation using OsO4 and H2S

All of the above

3

Which of the following additions to alkenes is anti?

Hydroboration - oxidation

Addition of Br2

Addition of H2O in dilute acid

None of the above

4

The addition of Br2 to (E)-but-2-ene produces:

A meso dibromide compound

A racemic mixture of dibromide compounds

Only one enantiomer of a dibromide compound optically active

(E)-2,3-dibromobut-2-ene

5

The treatment of cyclohexene with peroxybenzoic acid

yields a meso epoxide

yields an equimolar mixture of enantiomeric epoxides

results in oxidative cleavage of the ring

gives the same product as treatment of cyclohexene with OsO4

6

What function does the peroxide serve in the addition of HBr to alkenes?

Nucleophile

Electrophile

Radical chain initiator

Solvent

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