IUPAC name of `(CH_(3))_(3)C-CH_(2)-CHI-CH_(3)` is

Options

A. 2-Iodo-4,4-dimethylbutane
B. 4-Iodo-2,2-dimethylpentane
C. 2-Iodo-4,4-dimethylpentane
D. 3-Iodo-4,4-dimethylpentane

Answer

To determine the IUPAC name of the compound `(CH₃)₃C-CH₂-CHI-CH₃`, we can follow these steps:

### Step 1: Identify the Longest Carbon Chain
First, we need to identify the longest continuous chain of carbon atoms in the compound. In this case, we can see that the longest chain consists of 5 carbon atoms.

### Step 2: Number the Carbon Chain
Next, we need to number the carbon chain. We will assign numbers to the carbon atoms starting from the end closest to the first substituent. Here, if we start numbering from the left, we have:

1. C1: (CH₃)₃C
2. C2: CH₂
3. C3: CH
4. C4: CH₂
5. C5: CH₃

### Step 3: Identify and Name the Substituents
Now, we identify the substituents attached to the main chain:
- At carbon 2, there are two methyl (CH₃) groups.
- At carbon 4, there is an iodine (I) substituent.

### Step 4: Determine the Position of Substituents
We have:
- Two methyl groups at position 2 (2,2-dimethyl).
- One iodine substituent at position 4 (4-iodo).

### Step 5: Combine the Names of the Substituents
When writing the IUPAC name, we list the substituents in alphabetical order. The substituent "iodo" comes before "dimethyl" alphabetically. Therefore, we write:
- 4-iodo
- 2,2-dimethyl

### Step 6: Name the Main Chain
The main chain consists of 5 carbon atoms, which is called "pentane".

### Final IUPAC Name
Combining all parts, the full IUPAC name of the compound is:
**4-iodo-2,2-dimethylpentane**

### Summary
The IUPAC name of `(CH₃)₃C-CH₂-CHI-CH₃` is **4-iodo-2,2-dimethylpentane**.

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