Relation between Ethyl benzenecarboxylate and phenyl propanoate is:

Options

A. Metamers
B. Functional isomers
C. Chain isomers
D. Homologues

Explanation

To determine the relationship between ethyl benzenecarboxylate and phenyl propanoate, we can follow these steps:

### Step 1: Identify the Structures
- **Ethyl benzenecarboxylate** has the structure:
- Ethyl group (C2H5) attached to a benzenecarboxylate group (C6H5COO).
- The structure can be represented as:
\[ C_6H_5COO-C_2H_5 \]

- **Phenyl propanoate** has the structure:
- Phenyl group (C6H5) attached to a propanoate group (C2H5COO).
- The structure can be represented as:
\[ C_6H_5COO-CH_2-CH_3 \]

### Step 2: Analyze the Functional Groups
- Both compounds contain the same functional group, which is the carboxylate group (C=O and COO).
- The difference lies in the alkyl groups attached to the functional group:
- Ethyl benzenecarboxylate has an ethyl group (C2H5).
- Phenyl propanoate has a phenyl group (C6H5).

### Step 3: Determine the Type of Isomerism
- Since both compounds have the same functional group but different alkyl groups, they are classified as **metamers**.
- Metamers are isomers that have the same functional group but differ in the alkyl groups attached to it.

### Step 4: Verify Other Options
- **Functional isomers**: Different functional groups but same molecular formula. This does not apply here.
- **Chain isomers**: Different arrangements of carbon chains. This is not applicable as both have the same functional group.
- **Homologous series**: A series of compounds differing by a CH2 unit. This does not apply here either.

### Conclusion
The relationship between ethyl benzenecarboxylate and phenyl propanoate is that they are **metamers**.

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