Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give:

A Sec. butyl alcohol

B Tert. butyl alcohol

C Isobutyl alcohol

D Isopropyl alcohol

The answer is B.

Solution

$CH_3COCH_3 \xrightarrow{CH_3MgCl} (CH_3)_3C-OMgCl \xrightarrow{hydrolysis} (CH_3)_3C-OH$ The product is tert-butyl alcohol (2-methylpropan-2-ol).

Concept Grignard addition to a ketone

2 questions from this chapter have appeared across 2 exam years.