Which of the followingg compounds is not correctly matched wiith its IUPAC name?

Options

A. `CH_(3)CH_(2)CH_(2)COOCH_(2)CH_(3)`-Ethyl butanoate
B. `CH_(3)-underset(CH_(3))underset(|)(C)H-CH_(2)-CHO-3-`Methylbutanal
C. `CH_(3)-underset(CH_(3))underset(|)(C)H-underset(O)underset(||)(C)-CH_(2)CH_(3)-2-`methylpentan-3-one
D. `CH_(3)-underset(OH)underset(|)(C)H-underset(CH_(3))underset(|)(C)H-CH_(3)-3-`Methylbutan-3-ol

Explanation

To determine which compound is not correctly matched with its IUPAC name, we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Compounds and Their Structures:**
- We have four compounds (A, B, C, D) with their respective structures.

2. **Analyze Compound A:**
- Structure: CH3-CH2-CH2-C(=O)-O-CH2-CH3
- This compound has an ester functional group.
- The main carbon chain has 4 carbons (butanoate) and the alkyl group (ethyl) has 2 carbons.
- **IUPAC Name:** Ethyl butanoate.
- **Conclusion:** Correctly matched.

3. **Analyze Compound B:**
- Structure: CH3-CH(CH3)-CH2-CHO
- This compound has an aldehyde functional group.
- The longest carbon chain has 4 carbons, with a methyl group on the second carbon.
- **IUPAC Name:** 3-methylbutanal.
- **Conclusion:** Correctly matched.

4. **Analyze Compound C:**
- Structure: CH3-CO-CH(CH3)-CH2-CH3
- This compound has a ketone functional group.
- The longest carbon chain has 5 carbons, with a methyl group on the second carbon.
- **IUPAC Name:** 2-methylpentan-2-one.
- **Conclusion:** Correctly matched.

5. **Analyze Compound D:**
- Structure: CH3-CH(OH)-CH(CH3)-CH2-CH3
- This compound has an alcohol functional group.
- The longest carbon chain has 5 carbons, with a hydroxyl group on the third carbon.
- **IUPAC Name:** 3-methylpentan-2-ol.
- **Conclusion:** Incorrectly matched; it should be 3-methylpentan-3-ol.

### Final Answer:
The compound that is not correctly matched with its IUPAC name is **D**.

---