What is the relation between `3`-Ethylpentane and `3`-Methylhexane?

Options

A. Chain isomers
B. Position isomers
C. Functional isomers
D. Relation

Explanation

To determine the relationship between 3-Ethylpentane and 3-Methylhexane, we will analyze their structures and molecular formulas step by step.

### Step 1: Identify the structure of 3-Ethylpentane
- **Pentane** has 5 carbon atoms in its longest chain.
- The structure of 3-Ethylpentane can be drawn as follows:
- The main chain consists of 5 carbon atoms (C1, C2, C3, C4, C5).
- An ethyl group (C2H5) is attached to the third carbon (C3).

The structure is:
```
CH3
|
CH3-CH2-CH-CH2-CH3
|
CH2-CH3
```

### Step 2: Identify the structure of 3-Methylhexane
- **Hexane** has 6 carbon atoms in its longest chain.
- The structure of 3-Methylhexane can be drawn as follows:
- The main chain consists of 6 carbon atoms (C1, C2, C3, C4, C5, C6).
- A methyl group (CH3) is attached to the third carbon (C3).

The structure is:
```
CH3
|
CH3-CH2-CH-CH2-CH2-CH3
```

### Step 3: Determine the molecular formulas
- For 3-Ethylpentane:
- The molecular formula can be calculated as follows:
- 5 carbon atoms + 11 hydrogen atoms = C5H12.

- For 3-Methylhexane:
- The molecular formula can be calculated as follows:
- 6 carbon atoms + 14 hydrogen atoms = C6H14.

### Step 4: Compare the molecular formulas
- 3-Ethylpentane: C7H16
- 3-Methylhexane: C7H16

### Step 5: Identify the relationship
- Both compounds have the same molecular formula (C7H16) but different structural arrangements (different main chains).
- This indicates that they are **chain isomers** of each other.

### Conclusion
The relationship between 3-Ethylpentane and 3-Methylhexane is that they are **chain isomers**. They have the same molecular formula but differ in the structure of their carbon chains.

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