The common name of the compounds `CH_(2)=CH-CH_(2)-NH_(2)` is

Options

A. Vinyl amine
B. Allyl amine
C. Divinyl amine
D. Diallyl amine

Answer

To determine the common name of the compound \( CH_2=CH-CH_2-NH_2 \), we can follow these steps:

### Step 1: Identify the Structure
The given compound has a double bond between the first two carbon atoms and an amine functional group (\(-NH_2\)) attached to the third carbon. The structure can be represented as follows:
- \( CH_2 \) (first carbon)
- \( CH \) (second carbon, part of the double bond)
- \( CH_2 \) (third carbon, attached to the amine)

### Step 2: Recognize the Functional Groups
In this compound, we have:
- An alkene due to the presence of a double bond (between the first and second carbon).
- An amine functional group (\(-NH_2\)).

### Step 3: Determine the Parent Chain
The longest carbon chain that includes the double bond and the amine is three carbon atoms long. This is known as a propene chain because it contains three carbon atoms.

### Step 4: Identify the Substituents
The amine group is attached to the third carbon of the chain. Since the compound has a double bond, we can refer to the carbon chain as an allyl group when considering the amine.

### Step 5: Combine the Names
The common name is formed by combining the name of the allyl group with the amine functional group. The term "allyl" refers to the \( CH_2=CH- \) part of the molecule, and since the amine is attached, we call it "allyl amine".

### Final Answer
The common name of the compound \( CH_2=CH-CH_2-NH_2 \) is **allyl amine**.

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