The IUPAC name of the given structure is :-
`CH_(3)-undersetunderset(CH_(2)-CH_(2)-CH_(3))(|)oversetoverset(CH_(2)-CH_(3))(|)(C)-CH(CH_(3))_(2)`

Options

A. 3-Methyl-3-isopropyl hexane
B. 3-Isopropyl -3-methyl hexane
C. 3-Ethyl-2,3-dimethyl hexane
D. 2,3-Dimethyl-3-ethyl hexane

Answer

To determine the IUPAC name of the given structure, we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Longest Carbon Chain**:
- Look for the longest continuous chain of carbon atoms in the structure. In this case, the longest chain consists of 6 carbon atoms.

2. **Number the Carbon Chain**:
- Number the carbon chain starting from the end that gives the substituents the lowest possible numbers. Here, if we number from one end, we get:
- 1 - CH3
- 2 - CH (with substituents)
- 3 - CH (with substituents)
- 4 - CH2
- 5 - CH2
- 6 - CH3
- This numbering gives the substituents at positions 2 and 3.

3. **Identify and Name the Substituents**:
- The substituents on the main chain are:
- At position 2: a methyl group (CH3)
- At position 3: another methyl group (CH3)
- At position 3: an ethyl group (C2H5)
- Since there are two methyl groups, we will denote them as "dimethyl".

4. **Combine the Names of the Substituents**:
- When writing the name, we list the substituents in alphabetical order. The ethyl group comes before the methyl groups.
- Therefore, we write "3-ethyl" first, followed by "2,3-dimethyl".

5. **Add the Name of the Main Chain**:
- The main chain consists of 6 carbon atoms, which is named "hexane".

6. **Final IUPAC Name**:
- Combining all parts, the IUPAC name of the compound is "3-ethyl-2,3-dimethylhexane".

### Final Answer:
**The IUPAC name of the given structure is 3-ethyl-2,3-dimethylhexane.**

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