Which of the following compounds will show metamerism ?

Options

A. `CH_(3)COOC_(2)H_(5)`
B. `C_(2)H_(5)-S-C_(2)H_(5)`
C. `CH_(3)-O-CH_(3)`
D. `CH_(3)-OC_(2)H_(5)`

Explanation

To determine which of the given compounds will show metamerism, follow these steps:

### Step 1: Understand Metamerism
Metamerism is a type of isomerism where compounds with the same molecular formula have different structural arrangements due to the presence of a functional group that connects two different alkyl groups. The key is that the functional group remains the same while the alkyl groups differ.

### Step 2: Identify the Functional Group
For metamerism to occur, we need to identify compounds that have a bridging functional group. Common functional groups that can show metamerism include ethers, thioethers, and secondary amines.

### Step 3: Analyze the Options
Examine the given compounds to see if they contain a functional group that allows for different alkyl groups on either side of the functional group.

- **Ethers**: R-O-R' where R and R' can be different alkyl groups.
- **Thioethers**: R-S-R' where R and R' can be different alkyl groups.
- **Secondary Amines**: R-NH-R' where R and R' can be different alkyl groups.
- **Ketones and Esters**: These can also show metamerism if the alkyl groups differ.

### Step 4: Check Each Compound
1. **Compound 1**: Check if it has a functional group that can have different alkyl groups.
2. **Compound 2**: Check if it has a functional group that can have different alkyl groups.
3. **Compound 3**: Check if it has a functional group that can have different alkyl groups.

### Step 5: Conclusion
After analyzing the compounds, identify which one(s) have the same molecular formula but different structural arrangements due to different alkyl groups on either side of the functional group.

### Final Answer
Based on the analysis, **Compound 2** is the one that will show metamerism because it has a thioether functional group with different alkyl groups on either side.

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