Question

When acetaldehyde treated with methyl magnesium iodide (Grignard reagent) gives -------​

Answer 1

When acetaldehyde treated with methyl magnesium iodide or Grignard reagent, the product obtained is isopropyl alcohol.

Explanation:

• Grignard reagent is an organomagnesium halide developed by a French chemist Franois Auguste Victor Grignard. He was awarded noble prize in 1912 for his work.
• Grignard reagent is prepared from magnesium present on organic halide dissolved in solvent such as diethyl ether.
• Grignard reagent reacts with formaldehyde to give primary alcohol.
• Grignard reagent reacts with other aldehyde except formaldehyde to give secondary alcohol.
• Grignard reagent reacts with acetaldehyde to give isopropyl alcohol.

$CH_{3}MgI+CH_{3}CHO\overset{H_{3}O^{+}}{\rightarrow}CH_{3}CHOHCH_{3}+Mg(OH)I$