Question

The reagent used to convert
$C{H}_{3}C{H}_{2}COOH\to C{H}_{3}C{H}_{2}C{H}_{2}OH$ is

• A. $NaB{H}_4$
• B. $Na/\text{Dry Ether}$
• C. $RMgX,H_3{O}^{+}$
• D. $LiAl{H}_4$

Answer 1

The correct option is D $LiAl{H}_4$

Carboxylic acids (RCOOH) can be reduced to primary alcohols by lithium aluminum hydride $\left(LiAl{H}_4\right)$. $LiAl{H}_4$ is a strong reducing agent used in organic chemistry for reducing several organic compounds.
$RCOOH+LiAl{H}_4\to RC{H}_{2}OH$
for the given reaction, the reaction is as follow:
$C{H}_{3}C{H}_{2}COOH\underset{\left(i\right)H_{2}O}{\overset{\left(ii\right)LiAl{H}_4}{\to }}C{H}_{3}C{H}_{2}C{H}_{2}OH$