Question

Which of the following reagent would not be a good choice for reducing an aryl nitro compound to an amine?

• A. $H_{2(excess)}/Pt$
• B. $LiAlH_{4}$ in ether
• C. Fe and HCl
• D. Sn and HCl

Answer 1

Answer: (B)

$LiAlH_{4}$ in ether

Answer 2

: $LiAlH_{4}$ in ether reduces aryl nitro compounds to azo compounds

$\underset{Nitrobenzene}{2C_{6}H_{5}NO_{2}}\overset{\quad LiAlH_{4}/ether\quad}{\rightarrow}\underset{Diazobenzene}{C_{6}H_{5} - N = N - C_{6}H_{5}}$