The correct way(s) of representing 2-bromobutane is/are

Options

A. `CH_3CHBrCH_2CH_3`
B.
C.
D. All of the above

Answer

To represent 2-bromobutane correctly, we can follow these steps:

### Step 1: Identify the Structure of 2-Bromobutane
- The name "2-bromobutane" indicates that we have a butane (4 carbon atoms) with a bromine atom attached to the second carbon.
- The structural formula can be drawn as follows:
```
Br
|
CH3-CH-CH2-CH3
```

### Step 2: Write the Condensed Formula
- The condensed formula for 2-bromobutane can be written by listing the carbon atoms and their associated hydrogen atoms, while indicating the bromine atom's position.
- The condensed formula is:
```
CH3-CH(Br)-CH2-CH3
```

### Step 3: Write the Condensed Structural Formula
- The condensed structural formula is similar to the condensed formula but shows some bonds explicitly.
- It can be represented as:
```
CH3-CHBr-CH2-CH3
```
- This shows the bromine atom attached to the second carbon.

### Step 4: Draw the Line-Angle Structure
- In the line-angle structure, we represent carbon-carbon bonds with lines and omit hydrogen atoms.
- The line-angle structure for 2-bromobutane looks like this:
```
Br
|
------
```
- Each vertex represents a carbon atom, and the bromine is attached to the second carbon.

### Conclusion
- All the representations mentioned above are correct for 2-bromobutane:
1. Condensed formula: CH3-CH(Br)-CH2-CH3
2. Condensed structural formula: CH3-CHBr-CH2-CH3
3. Line-angle structure: A line structure with bromine attached to the second carbon.

### Final Answer
All of the above representations are correct for 2-bromobutane.

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