Question

The reaction is carried out by: 

• A. Diethyldimethyl mercaptol
• B. Propane
• C. 2-Methylbutan-2-ol
• D. Propan-2-thiol

Hint:

Hydrogenation with Ni in ethanol reduces the acyl group to a thiol group, often yielding thiol-containing compounds.

Answer 1

The Correct Option is D

This reaction involves the following steps:

Step 1: Acid Chloride Formation.
The first step of the reaction is the conversion of 2-pentanone into an acyl chloride using HCl and EISH. This forms a reactive acyl chloride intermediate.

Step 2: Hydrogenation.
Next, the acyl chloride undergoes reduction in the presence of nickel (Ni) and ethanol (EtOH), which leads to the formation of a thiol group (–SH) in the final product.

Step 3: Conclusion.
The final major product is propane-2-thiol, which corresponds to option (4).

Final Answer: \[ \boxed{\text{(4) Propan-2-thiol}} \]