Question

In the following hydration reaction, mercuric sulphate is used (instead of mercuric acetate as in alkene). It is due to

(a) sulphate is a very poor nucleophile 

(b) it does not compete with \( H _{2} O \) which traps the carbocation to yield a vinyl alcohol 

(c) Both (a) and (b) 

(d) None of the above

Answer 1

The mechanism of the above reaction will be -

Here, HgSO₄ and H₂SO₄ is act as a catalyst and it does not complete with H₂O.

Hence option (c) is right answer.

Comments

Correct answer is c

Answer 2

The correct answer is (c)

Answer 3

ketone - 

due to stabilization of negative charge on \(SO_4^{-2}\). It is a poor nucleophile than \(H_2\overset{.}O^..\) and there is no competition between \(H_2O\) and \(SO_4^{-2}\) to trap carbocation.

Hence, option (c) is right answer.