Question

Consider the following compound:

What is the IUPAC nomenclature of the compound?

• A. 2,5,6-trimethyl octane
• B. 3,4,7-trimethyl octane
• C. 2,4-ethyl, 3-methyl octane
• D. Isopropyl hexane

Answer 1

The Correct Option is A

To determine the IUPAC nomenclature of the given compound, we must follow these steps:

1. Identify the longest continuous carbon chain: In the given structure, the longest chain consists of eight carbon atoms, indicating the parent chain is an octane.
2. Identify and name the substituents: The compound has three methyl groups attached to the main chain at the 2nd, 5th, and 6th carbon atoms.
3. Number the chain: Number the carbon atoms in the main chain to provide the substituents with the lowest possible numbers. This results in:
   • 2-methyl
   • 5-methyl
   • 6-methyl
4. Combine the names and numbers of the substituents: The correct IUPAC name for the compound is: 2,5,6-\text{trimethyl octane}

Conclusion: The correct IUPAC name is 2,5,6-trimethyl octane. The other options are incorrect as they do not match the substituents and parent chain described.