What should be the correct IUPAC name for diethylbromomethane?

Options

A. 1-Bromo-1,1-diethylmethane
B. 3-Bromopentane
C. 1-Bromo-1-ethypropane
D. 1-Bromopentane

Answer

To determine the correct IUPAC name for diethylbromomethane, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Components**: The name "diethylbromomethane" indicates that we have a bromine atom and two ethyl groups attached to a methane backbone.

2. **Construct the Structure**:
- The base structure is methane (CH₄), which has one carbon atom.
- Since we have two ethyl groups (C₂H₅), we can visualize the structure as follows:
- The central carbon (from methane) will be bonded to a bromine atom and two ethyl groups.
- The structure can be represented as:
```
CH2-CH3
|
CH3-C-Br
|
CH2-CH3
```

3. **Determine the Longest Carbon Chain**:
- The longest continuous carbon chain in this structure is three carbon atoms long (from the central carbon and the two ethyl groups).
- Therefore, we can identify the longest chain as propyl (C₃H₇).

4. **Number the Carbon Chain**:
- Number the carbon chain starting from the end closest to the substituent (bromine).
- In this case, the bromine is attached to the second carbon of the propyl chain.

5. **Write the IUPAC Name**:
- The bromine substituent is on the second carbon of the propyl chain.
- Therefore, the IUPAC name will be "2-bromopropane".

### Final Answer:
The correct IUPAC name for diethylbromomethane is **2-bromopropane**.