Question

The compound which reacts fastest with Lucas reagent at room temperature is ______.

विकल्प

• butan-1-ol

• butan-2-ol

• 2-methyl propan-1-ol

• 2-methyl propan-2-ol

Answer 1

The compound which reacts fastest with Lucas reagent at room temperature is 2-methyl propan-2-ol.

Explanation:

The rates of reaction with Lucas reagent follow the order.

3° alcohol > 2° alcohol > 1° alcohol

Because they are produced as intermediates, the more stable the carbocation, the more reactive the parent molecule will be (alcohol). Since 2-methyl propan-2-ol produces a 3° carbocation rather than the other three's 1° or 2°, it will react first.

\[\ce{\underset{2-methyl propan-2-ol}{(CH3)3 - C - OH} ->[H^+] (CH3)3 - C^⊕ ->[Br^-] (CH3)3 - C - Br}\]