Question

Which of the following reagents would not be a good choice
for reducing an aryl nitro compound to an amine?
(a) H₂ (excess) / Pt (b) LiAlH₄ in ether
(c) Fe and HCl (d) Sn and HCl

Answer 1

Answer:

Option a) H2 is the answer

Answer 2

LiAlH₄ in ether reagents would not be a good choice  for reducing an aryl nitro compound to an amine.

Step by step explanation:

• LiAlH₄  is a strong reducing agent .It reduce the C=O group N=O group present in the given compounds.

• It can reduces aldehydes to primary alcohols,esters to primary alcohols,epoxides to alcohols and nitriles to amines.

• It is a unselective reducing agent for molecule which contains polar bonds.

• The chemical reaction of reduction of nitro compounds to amine by using is as follows.

$2 C_{6} H_{5} N O_{2} \overset{LiAlH_{4}}{\rightarrow} C_{6} H_{5} N=N-C_{6} H_{5}$

In the above reaction nitro benzene is converted into azo benzene.

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