Which of the following name is correct :-

Options

A. 4-Isopropyl-3-methyl hexane
B. 2-Ethyl-3-isopropyl pentane
C. 3-Isopropyl-4-methyl hexane
D. 3-Ethyl-2,4-dimethyl hexane

Answer

To determine the correct IUPAC name for the compound given in the question, we need to follow a systematic approach to naming organic compounds. Here’s a step-by-step solution:

### Step 1: Identify the Longest Carbon Chain
- The first step in naming an organic compound is to identify the longest continuous carbon chain. In this case, the name suggests that we have a hexane backbone, which means there are 6 carbon atoms in the longest chain.

### Step 2: Number the Carbon Chain
- Number the carbon chain starting from the end nearest to the first substituent. This will help us assign the correct locants (numbers) to the substituents.

### Step 3: Identify and Name the Substituents
- The name provided includes "4-isopropyl" and "3-methyl."
- "3-methyl" indicates a methyl group (-CH₃) is attached to the third carbon of the hexane chain.
- "4-isopropyl" indicates an isopropyl group (which is a common name) is attached to the fourth carbon. However, isopropyl is not used in IUPAC naming; instead, we need to use the correct IUPAC name for the substituent.

### Step 4: Convert Common Names to IUPAC Names
- The isopropyl group can be represented as "1-methyl ethyl" in IUPAC nomenclature. Therefore, we need to replace "4-isopropyl" with "1-methyl ethyl" at the fourth position.

### Step 5: Write the Complete IUPAC Name
- After identifying the substituents and their positions, we can write the complete IUPAC name. The correct name for the compound, considering the substituents and their positions, is "3-ethyl-2,4-dimethylhexane."

### Step 6: Verify the Name
- Ensure that the name follows the IUPAC rules:
- The longest chain is hexane (6 carbons).
- The substituents are correctly numbered and named.
- The name reflects the structure accurately.

### Conclusion
- The correct IUPAC name for the compound is **3-ethyl-2,4-dimethylhexane**.