Question:

IUPAC name of the following compound is: 

Show Hint

In IUPAC nomenclature, ethers are named as alkoxy derivatives of benzene. The longest chain is selected as the alkoxy group, and substituents are numbered accordingly.
Updated On: Mar 13, 2025
  • 2-Methyl pentoxybenzene
  • 4-Methyl pentoxybenzene
  • Phenoxy-4-methylpentane
  • Phenoxy-2-methylpentane 

Hide Solution
collegedunia
Verified By Collegedunia

The Correct Option is B

Solution and Explanation


Step 1: Identifying the Functional Group and Parent Chain 
- The given structure consists of a benzene ring attached to an alkoxy (-O-R) group.
- The longest alkyl chain attached to the oxygen atom is pentane (C\(_5\)H\(_{11}\)), making it a pentoxy (-O-C\(_5\)H\(_{11}\)) derivative.
Step 2: Identifying Substituents and Their Positions 
- A methyl (-CH\(_3\)) group is present on the fourth carbon of the pentoxy chain.
- The oxygen is directly attached to the benzene ring, making it an alkoxybenzene.
Step 3: Naming the Compound 
- The correct IUPAC name follows the alkoxybenzene convention, with the longest chain numbered from the oxygen atom.
- Since the methyl group is at the 4th position, the correct name is 4-Methyl pentoxybenzene.
Step 4: Evaluating the Given Options 
- Option (1): Incorrect, as the methyl group is at position 4, not 2.
- Option (2): Correct, as 4-Methyl pentoxybenzene is the correct name.
- Option (3): Incorrect, as the functional group should be named as "alkoxybenzene," not "phenoxyalkane."
- Option (4): Incorrect, as the methyl group is at position 4, not 2.
Thus, the correct answer is 

Option (2)

Was this answer helpful?
0
0