Question
Question: Which of the following conversions needs the reagent Sn/HCl?...
Which of the following conversions needs the reagent Sn/HCl?

A
R-NO₂→R-NH₂ + 2H₂O
B
R-CO-NH₂→R-NH₂
C
R-C≡N→R-CH₂-NH₂
D
R-CO-NH₂→R-CH₂-NH₂
Answer
(A)
Explanation
Solution
Sn/HCl is used for reducing nitro groups. Thus, the conversion R–NO₂ → R–NH₂ + 2H₂O requires Sn/HCl.