Question

Identify reagent B in following reaction.
\(\text{R}-\text{X}\overset{\text{B} \,}{\rightarrow }\text{Nitroalkane}\)

• A. \(\text{Ag}-\text{O}-\text{N} = \text{O}\)
• B. \(\text{NaOR}\)
• C. \(\text{KCN (alc.)}\)
• D. \(\text{K}-\text{O}-\text{N} = \text{O}\)

Hint:

Silver nitrite (AgNO2) is covalent and attacks through nitrogen to give nitroalkane.

Answer 1

The Correct Option is A

Step 1: Rule:
Covalent AgNO$_2$ gives nitroalkane, ionic KNO$_2$ gives alkyl nitrite.

Step 2: Application:
The question wants a nitroalkane, so the silver salt is needed. NaOR makes ethers (Williamson) and KCN makes cyanides.

Step 3: Answer:
Option (A).

Final Answer:
Option (A). \[ \boxed{\text{(A) AgNO}_2} \]