Question

Hydration of propene in the presence of dilute sulphuric acid

Answer 1

Hydration:

Hydration of Alkenes to form alcohols:

Acid Catalysed Hydration:

$CH_3-CH=CH_2\xrightarrow{dil. H_2SO_4}\:\:CH_3-CH(OH)CH_3 \\ Prop-1-ene \:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:Propan-2-ol$

$\cdot$ Reaction is proceeded by stable carbocation intermediate due to protonation and Hence, Regioselectivity is decided by Markovinov's Rule.

$\cdot$ Reaction is not stereoselective.

Answer 2

Explanation:

Hydration of propene in the presence of dilute sulphuric acid will result in the formation of a carbocation as an intermediate. It is known that secondary carbocation is more stable than primary carbocation. Thus, the hydroxide ion will attach to the secondary carbon of propene.

Therefore, according to Markonikov's rule regioselectivity will be favoured over stereoselectivity.