Question

The IUPAC name of the following molecule is: 

 

• A. 2-Methyl-5-nitro-1-chlorobenzene
• B. 3-Chloro-4-methyl-1-nitrobenzene
• C. 2-Chloro-1-methyl-4-nitrobenzene
• D. 2-Chloro-4-nitro-1-methylbenzene

Hint:

In benzene derivatives, numbering starts from the highest priority group to ensure the lowest numbering sequence.

Answer 1

The Correct Option is C

Step 1: Understanding IUPAC Nomenclature Rules 
The longest chain in the benzene ring is chosen as the parent chain. The substituents are assigned numbers based on priority groups to ensure the lowest possible sum. 
Step 2: Numbering the Benzene Ring 
Methyl (\(-CH_3\)) is given the highest priority and assigned position 1. Chlorine (\(-Cl\)) is then assigned position 2, and nitro (\(-NO_2\)) is assigned position 4. 
Step 3: Naming the Compound 
The correct name following IUPAC rules is 2-Chloro-1-methyl-4-nitrobenzene. Thus, the correct answer is (C).