The `IUPAC` name of `(CH_(3))_2)CHCH_(2)CH_(2)Br` is

Options

A. (1) `1`-bromo-`3`-methylbutane
B. (2) `1`-bromopentane
C. (3) `2`-methyl-`4`-bromobutane
D. (4) `2`-methyl-`3`-bromopropane

Explanation

To determine the IUPAC name of the compound `(CH₃)₂CHCH₂CH₂Br`, we can follow these steps:

### Step 1: Expand the Structure
First, we expand the structure to visualize the arrangement of carbon atoms and the bromine atom:
- The compound can be expanded as:
- CH₃ - C(CH₃) - CH₂ - CH₂ - Br

### Step 2: Identify the Parent Chain
Next, we need to identify the longest continuous carbon chain, which will serve as the parent chain:
- The longest chain consists of 5 carbon atoms:
- CH₃ - C(CH₃) - CH₂ - CH₂ - Br

### Step 3: Number the Carbon Chain
We will number the carbon chain starting from the end nearest to the functional group (bromine in this case) to give it the lowest possible number:
- Numbering from the left gives:
- 1 (Br), 2 (CH₂), 3 (C(CH₃) - branching), 4 (CH), 5 (CH₃)

### Step 4: Identify Substituents
Now we identify the substituents:
- There is a bromine (Br) substituent on carbon 1.
- There are two methyl (CH₃) groups on carbon 3.

### Step 5: Assemble the Name
Now we can assemble the IUPAC name:
- The substituents are named in alphabetical order, followed by the name of the parent chain and the functional group:
- The name will be:
- 1-Bromo-3,3-dimethylpentane

### Final IUPAC Name
Thus, the IUPAC name of the compound `(CH₃)₂CHCH₂CH₂Br` is **1-Bromo-3,3-dimethylpentane**.

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