Question

Which one of the following is true about this reaction?

• A. A is meso-2, 3-butanediol formed by syn addition
• B. A is meso-2, 3-butanediol formed by anti-addition
• C. A is a racemic mixture of d and l-2, 3-butanediol formed by anti-addition
• D. A is a racemic mixture of d and l-2, 3-butanediol formed by syn addition

Answer 1

Answer: (D)

Alkenes form diol, when treated with alkaline ${\text{KMnO}}_{\text{4}}.$ The reaction occurs by syn-addition