The correct IUPAC name for `CH_(2)=CHCH_(2)NHCH_(3)` is

Options

A. allyl methylamine
B. 2-amiono-4-pentane
C. 4-aminopent-1-ene
D. N-methylprop-2-ene-1-amine

Explanation

To determine the correct IUPAC name for the compound \( CH_2=CHCH_2NHCH_3 \), we can follow these steps:

### Step 1: Identify the structure
The given compound can be broken down as follows:
- There is a double bond between the first two carbon atoms.
- The nitrogen atom is connected to a carbon chain and has a methyl group attached to it.

### Step 2: Determine the amine type
Since the nitrogen atom is bonded to two carbon groups (one from the carbon chain and one from the methyl group), this compound is classified as a **secondary amine**.

### Step 3: Identify the longest carbon chain
The longest carbon chain in the compound is three carbons long, which corresponds to **propane**. However, since there is a double bond, we need to specify the position of the double bond.

### Step 4: Number the carbon chain
Number the carbon chain starting from the end closest to the double bond:
1. \( CH_2 \) (1)
2. \( CH \) (2)
3. \( CH_2 \) (3)

This gives us a propene structure. The double bond is between carbon 1 and carbon 2, so we denote it as **prop-2-ene**.

### Step 5: Identify the substituents
The nitrogen atom is bonded to a methyl group (\( CH_3 \)). When naming the substituent attached to the nitrogen, we use the prefix "N-" to indicate that it is attached to the nitrogen atom. Therefore, we have **N-methyl**.

### Step 6: Combine the names
Putting it all together, we have:
- The longest chain is **prop-2-ene**.
- The amine group is on carbon 1, which we denote as **1-amine**.
- The substituent is **N-methyl**.

Thus, the full IUPAC name of the compound is **N-methylprop-2-ene-1-amine**.

### Final Answer
The correct IUPAC name for \( CH_2=CHCH_2NHCH_3 \) is **N-methylprop-2-ene-1-amine**.

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