Write IUPAC names of the following compounds :
`CH_(3)underset("I")underset(|)(C)HCH_(3)`

Answer

To determine the IUPAC name of the compound `CH₃CH(CH₃)CH₂I`, we will follow the systematic approach for naming organic compounds.

### Step-by-Step Solution:

1. **Identify the Parent Chain**:
- The first step is to identify the longest continuous carbon chain in the compound. In this case, the longest chain consists of three carbon atoms.
- The structure can be visualized as:
```
CH₃
|
CH₃-CH-CH₂
|
I
```

2. **Number the Carbon Atoms**:
- Next, we need to number the carbon atoms in the parent chain. We will number them in such a way that the substituents and functional groups receive the lowest possible numbers.
- Starting from the left, we can number the carbon atoms as follows:
- C1: CH₃
- C2: CH
- C3: CH₂
- Thus, the numbering is:
```
1 2 3
CH₃ - CH - CH₂
|
I
```

3. **Identify Substituents**:
- In this compound, we have a methyl group (−CH₃) attached to the second carbon and an iodine (−I) attached to the third carbon.
- The substituents are:
- Methyl group (−CH₃) at C2
- Iodine (−I) at C3

4. **Construct the Name**:
- The IUPAC name is constructed by combining the names of the substituents with the name of the parent chain.
- The parent chain is propane (since it has three carbon atoms).
- The substituents are named with their respective positions:
- The methyl group is at position 2 (2-methyl).
- The iodine is at position 3 (3-iodo).
- Therefore, the full name is:
- 3-iodo-2-methylpropane.

5. **Final IUPAC Name**:
- The final IUPAC name of the compound `CH₃CH(CH₃)CH₂I` is **3-iodo-2-methylpropane**.