Question

Compound ‘B’ is

• A.

  

• B.

  

• C.

  

• D.

  

Answer 1

The Correct Option is B

The given reaction sequence is;

Step 1: Diazotization. The first step involves the reaction of the given compound (2-hydroxycyclohexanone) with sodium nitrite (NaNO2) and hydrochloric acid (HCl). This is a diazotization reaction, which converts the amino group (-NH2) of an aromatic amine to a diazonium salt (-N⁺ 2Cl⁻). This reaction doesn’t happen with the carbonyl group. Since the starting compound shown is not an amino compound, it needs to have NH2 for diazotization reaction to happen. Hence it would be more logical if the question used a starting compound of 2-aminocyclohexanol rather than 2-hydroxycyclohexanone. Let’s assume that the starting material is

Then the diazonium salt is formed

Step 2: Reduction of Diazonium salt. The second step involves the reaction of the diazonium salt (A) with ammonium hydrosulfide (NH4SH) in water. This re duces the diazonium salt to the corresponding amine, with nitrogen gas as a byproduct.
So the final product B is 2-aminocyclohexanol.