The `IUPAC` name of `CH_(2)-CH_(2)-undersetunderset(CH_(3))(|)(N)-CH_(2)-CH_(3)` is:

Options

A. `N`-Methyl-`N`-ethyl ethanamine
B. Diethyl methanamine
C. `N`-Ethyl-`N`-methyl ethanamine
D. Methyl diethyl ethanamine

Answer

To determine the IUPAC name of the compound `CH₂-CH₂-(CH₃)(N)-CH₂-CH₃`, we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure**:
The given structure can be represented as:
```
CH3
|
CH2-CH2-N-CH2-CH3
```
This indicates that we have a nitrogen atom (N) bonded to two ethyl groups (CH₂-CH₃) and one methyl group (CH₃).

2. **Determine the Type of Amine**:
Since the nitrogen atom is bonded to three carbon-containing groups (two ethyl groups and one methyl group), this compound is classified as a tertiary amine.

3. **Select the Parent Chain**:
The longest carbon chain containing the nitrogen is the ethyl chain (C2). Therefore, the parent chain is derived from ethane.

4. **Identify the Alkyl Groups**:
The substituents on the nitrogen are:
- Ethyl group (C₂H₅)
- Methyl group (CH₃)

5. **Naming the Alkyl Groups**:
According to IUPAC nomenclature, we list the substituents in alphabetical order. The ethyl group comes before the methyl group.

6. **Construct the Name**:
The general format for naming a tertiary amine is:
- N-alkyl-N-alkyl-alkaneamine
In this case, it will be:
- N-ethyl-N-methyl-ethanamine

7. **Final IUPAC Name**:
Therefore, the final IUPAC name of the compound is:
**N-ethyl-N-methylethanamine**.