The IUPAC name of `CH_(3)-CH_(2)-NH-CH_(3)` is :-

Options

A. Methyl ethyl amine
B. 1-methyl amino ethane
C. N-methyl ethanamine
D. N-ethyl methanamine

Answer

To find the IUPAC name of the compound `CH₃-CH₂-NH-CH₃`, we will follow these steps:

### Step 1: Identify the Structure
The given structure consists of two carbon chains and an amine functional group. The compound can be visualized as:
- A two-carbon chain (ethyl group) on one side (`CH₃-CH₂-`)
- A one-carbon chain (methyl group) on the other side (`-NH-CH₃`)

### Step 2: Determine the Longest Carbon Chain
We need to identify the longest carbon chain that is directly connected to the nitrogen atom. In this case, the longest chain is the ethyl group (`CH₃-CH₂-`), which has 2 carbon atoms.

### Step 3: Number the Carbon Chain
Number the carbon chain starting from the end closest to the nitrogen atom. This gives us:
- Carbon 1: `CH₃`
- Carbon 2: `CH₂`

### Step 4: Identify the Substituents
The nitrogen atom (`NH`) is connected to a methyl group (`CH₃`). This methyl group is considered a substituent on the nitrogen.

### Step 5: Combine the Information
Now, we can combine the information:
- The main chain is ethyl (2 carbon atoms).
- The nitrogen is connected to a methyl group, which we denote as "N-methyl".

### Step 6: Determine the Functional Group
Since the compound contains an amine functional group (due to the presence of nitrogen), we will indicate this in the name.

### Step 7: Write the IUPAC Name
Putting it all together, we have:
- The longest carbon chain (ethyl) is 2 carbons.
- The substituent on nitrogen is a methyl group.
- The functional group is amine.

Thus, the IUPAC name of the compound is **N-methyl ethanamine**.

### Final Answer
The IUPAC name of `CH₃-CH₂-NH-CH₃` is **N-methyl ethanamine**.

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