How many primary halides are possible for `C_5H_(11)Br` ?

Options

A. 1
B. 2
C. 3
D. 4

Answer

To determine how many primary halides are possible for the compound \( C_5H_{11}Br \), we can follow these steps:

### Step 1: Understand the Structure
The molecular formula \( C_5H_{11}Br \) indicates that we have a pentane structure with a bromine atom attached. Pentane has five carbon atoms, and we need to consider where the bromine can be attached.

### Step 2: Identify Primary Halides
A primary halide (or primary alkyl halide) is one where the carbon atom bonded to the halogen (in this case, bromine) is attached to only one other carbon atom. This means that the carbon with the bromine should have two hydrogen atoms attached to it.

### Step 3: Draw Possible Structures
1. **1-Bromopentane**:
- Structure: \( CH_3-CH_2-CH_2-CH_2-CH_2Br \) (Bromine attached to the first carbon)
- This is a primary halide because the carbon with bromine is attached to only one other carbon.

2. **2-Bromopentane**:
- Structure: \( CH_3-CH_2-CHBr-CH_2-CH_3 \) (Bromine attached to the second carbon)
- This is a secondary halide because the carbon with bromine is attached to two other carbons.

3. **3-Bromopentane**:
- Structure: \( CH_3-CHBr-CH_2-CH_2-CH_3 \) (Bromine attached to the third carbon)
- This is also a secondary halide.

### Step 4: Conclusion
From the above analysis, we can conclude that the only primary halide possible for \( C_5H_{11}Br \) is **1-bromopentane**. Therefore, the total number of primary halides is **1**.

### Final Answer
The number of primary halides possible for \( C_5H_{11}Br \) is **1**.

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