Question

Name the reagent used in the following reaction Butan$-2-$one to Butan$-2-$ol

Answer 1

Reduction of Ketone:

• It is the process of adding hydrogen to a molecule or removing electronegative atoms like halogen or oxygen.
• Lithium aluminum hydride (${\mathrm{LiAlH}}_4$) or sodium borohydride (${\mathrm{NaBH}}_4$) is used for the conversion of aldehydes and ketones to alcohol.
• As a result, ${\mathrm{H}}_2$ are net added across the$\mathrm{C}=\mathrm{O}$ bond.
• Because hydride is not polarizable, it is not a suitable nucleophile by itself. However, sodium borohydride serves as a carrier for nucleophilic hydride anion. In addition, the solvent serves as a proton source.
• The intermediate formed by initially transferring the hydride ion can attack three additional carbonyl substrates until all of the hydride atoms in the original reagent have been completely.
• The reagent gives hydride to the carbonyl carbon in this medium, while the solvent protonates the carbonyl oxygen
• To liberate the alcohol from the complex ion, the product is treated with dilute acid (such as dilute sulfuric acid or dilute hydrochloric acid).

• Reaction for converting Butan$-2-$one to Butan$-2-$ol is shown as

Therefore, ${\mathrm{LiAlH}}_4$ Lithium aluminum hydride or ${\mathrm{NaBH}}_4$ Sodium borohydride is used for converting Butan$-2-$one to Butan$-2-$ol.