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

Options

A. N-formyl ethanamine
B. Ethyl amino methanal
C. N-ethyl methanamide.
D. None of them

Answer

To determine the IUPAC name of the compound \( CH_3CH_2NHCHO \), we can follow these steps:

### Step 1: Identify the Functional Groups
The compound contains two functional groups:
- An aldehyde group (\(-CHO\))
- An amine group (\(-NH_2\))

### Step 2: Determine the Parent Chain
The aldehyde group takes precedence in naming. Therefore, the longest carbon chain that includes the aldehyde will be the parent chain. In this case, the longest chain is two carbons long, which corresponds to the compound ethanal (acetaldehyde).

### Step 3: Number the Carbon Chain
Number the carbon atoms in the chain starting from the end nearest to the aldehyde group. The aldehyde carbon will be carbon 1. Thus, the structure can be represented as:
- Carbon 1: \(CHO\) (aldehyde)
- Carbon 2: \(CH_2\) (attached to \(NH\))

### Step 4: Identify and Name the Substituents
The amine group (\(-NH_2\)) is attached to the second carbon. Since it is a two-carbon chain with an amine group, we will refer to it as "ethyl" because it is derived from ethane.

### Step 5: Combine the Names
Since the amine group is attached to the nitrogen, we will use the prefix "N-" to indicate its position. The complete name will be:
- "N-ethyl" (indicating the ethyl group attached to nitrogen)
- "methanamide" (indicating the amide formed from the aldehyde)

### Final IUPAC Name
Putting it all together, the IUPAC name of the compound \( CH_3CH_2NHCHO \) is **N-ethylmethanamide**.