Question

Find out the major products from the following reactions

• A.
• B.
• C.
• D.

Hint:

Markovnikov’s Rule: The electrophile adds to the more substituted carbon.
Anti-Markovnikov’s Rule: The electrophile adds to the less substituted carbon.

Answer 1

The Correct Option is B

• In the presence of \(Hg(OAc)_2, H_2O, NaBH_4\), an alkene undergoes oxymercuration-demercuration, which adds water across the double bond following 
Markovnikov’s rule. The hydroxyl group attaches to the more substituted carbon atom.
• In the presence of\( BH_3, THF, H_2O_2/OH^−\), an alkene undergoes hydroboration-oxidation, which adds water across the double bond following
Anti-Markovnikov’s rule. The hydroxyl group attaches to the less substituted carbon atom.
Thus:
• Product A is the Anti-Markovnikov product (from hydroboration-oxidation).
• Product B is the Markovnikov product (from oxymercuration-demercuration).