Question

The reagent used for the conversion of:

• A. ${\mathrm{B}}_2{\mathrm{H}}_6$
• B. ${\mathrm{NaBH}}_4$
• C. ${\mathrm{H}}_2,\mathrm{Pd}$
• D. ${\mathrm{LiAlH}}_4$

Answer 1

The correct option is A

${\mathrm{B}}_2{\mathrm{H}}_6$

Explanation for the correct option:

Option (A): ${\mathrm{B}}_2{\mathrm{H}}_6$

• ${\mathrm{B}}_2{\mathrm{H}}_6$ does not reduce cyanide, amide, or carbonyl groups.
• Alcohol is produced by selectively reducing carboxylic acid.
• It is therefore the most appropriate reagent for this conversion.

Explanation for incorrect options:

Option B: ${\mathrm{NaBH}}_4$

• Aldehydes and ketones can be converted to alcohols with great efficiency when using Sodium Borohydride ${\mathrm{NaBH}}_4$.

Option C: ${\mathrm{H}}_2,\mathrm{Pd}$

• This reagent is used for hydrogenation.

Option D: ${\mathrm{LiAlH}}_4$

• ${\mathrm{LiAlH}}_4$ reagent can convert amides and nitriles to amines, carboxylic acids and esters to primary alcohols, and aldehydes to primary alcohols.

Final Answer: Therefore, option A is the correct option.