The IUPAC name of `CH_(3)-CH_(2)-underset(CH_(3))underset(|)(CH)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-CH_(3)` is

Options

A. 2,2,3-trimethylpentane
B. 3,4,4-trimethylpentane
C. 2-ethyl-3,3-dimethylbutane
D. 2,3-dimethylhexane

Explanation

To determine the IUPAC name of the compound `CH₃-CH₂-CH(CH₃)-CH(CH₃)-C(CH₃)-CH₃`, follow these steps:

### Step-by-Step Solution:

1. **Identify the Longest Carbon Chain**:
- Look for the longest continuous chain of carbon atoms in the compound. In this case, the longest chain has 5 carbon atoms.
- The longest chain is: `CH₃-CH₂-CH-CH-CH₃`.

2. **Number the Carbon Chain**:
- Number the carbon atoms in the chain from one end to the other. Start from the end that gives the substituents the lowest possible numbers.
- In this case, numbering from left to right gives the following:
- C1: CH₃
- C2: CH₂
- C3: CH (with two methyl groups attached)
- C4: CH (with one methyl group attached)
- C5: CH₃

3. **Identify and Name the Substituents**:
- Identify the substituents attached to the carbon chain. Here, we have:
- Two methyl groups on C3 (2,2-dimethyl)
- One methyl group on C4 (1-methyl)
- Therefore, we have three methyl groups in total.

4. **Construct the IUPAC Name**:
- Combine the names of the substituents with the name of the parent chain.
- The parent chain with 5 carbon atoms is called "pentane".
- Since there are two methyl groups on C3 and one on C4, the full name will be:
- 2,2,3-trimethylpentane.

5. **Final IUPAC Name**:
- The final IUPAC name of the compound is **2,2,3-trimethylpentane**.