Which of the following IUPAC names is not correctly matched?

Options

A.
B. `(CH_(3))_(2)C=CHCOOH` : 3-Methylbut-2-enoic acid
C. `PhCH_(2)CH_(2)COOH`: 3-Phenylpropanoic acid
D.

Explanation

To determine which of the given IUPAC names is not correctly matched, we will analyze each option step by step.

### Step 1: Analyze Option A
1. **Structure Identification**: Identify the structure of the compound. It is a cyclic compound with five carbon atoms (cyclopentane) and a carboxylic acid functional group.
2. **Numbering**: Start numbering from the carbon with the carboxylic acid group to give the substituents the lowest possible numbers. The numbering goes as follows:
- 1 (carboxylic acid), 2 (methyl), 3, 4, 5.
3. **Substituent Identification**: The substituent is a methyl group on the second carbon.
4. **Naming**: The name should be 2-methylpentanoic acid. However, the option does not match this name correctly.

### Step 2: Analyze Option B
1. **Structure Identification**: This compound has a four-carbon chain (butane) with a carboxylic acid group and a methyl group.
2. **Numbering**: Number the chain starting from the end closest to the carboxylic acid:
- 1 (carboxylic acid), 2, 3 (methyl), 4.
3. **Substituent Identification**: The substituent is a methyl group on the third carbon.
4. **Naming**: The correct name is 3-methylbutanoic acid. This matches the given name.

### Step 3: Analyze Option C
1. **Structure Identification**: This compound has a propane chain with a phenyl group as a substituent.
2. **Numbering**: Number the chain starting from the end closest to the carboxylic acid:
- 1 (carboxylic acid), 2, 3 (phenyl).
3. **Substituent Identification**: The substituent is a phenyl group on the third carbon.
4. **Naming**: The correct name is 3-phenylpropanoic acid. This matches the given name.

### Step 4: Analyze Option D
1. **Structure Identification**: This compound has a benzene ring with three nitro groups and a carboxylic acid group.
2. **Numbering**: Number the benzene ring to give the nitro groups the lowest possible numbers:
- 1 (carboxylic acid), 2 (nitro), 4 (nitro), 6 (nitro).
3. **Substituent Identification**: The substituents are nitro groups at positions 2, 4, and 6.
4. **Naming**: The correct name is 2,4,6-trinitrobenzoic acid. This matches the given name.

### Conclusion
After analyzing all options, it is clear that **Option A** is the incorrectly matched IUPAC name. The correct name should be 2-methylpentanoic acid, but it does not match the provided name.

### Final Answer
**Option A is not correctly matched.**

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