IUPAC name of isopropylamine is ___________ .

Options

A. Propan-1-amine
B. 2-Methylethanamine
C. 1-Methylethanamine
D. Propan-2-amine

Answer

To determine the IUPAC name of isopropylamine, we can follow these steps:

### Step 1: Identify the Structure
Isopropylamine consists of an isopropyl group (which is a branched alkyl group) attached to an amine functional group (–NH2). The structure can be represented as follows:

```
CH3
|
CH3 - CH - NH2
```

### Step 2: Determine the Longest Carbon Chain
In this case, the longest carbon chain contains three carbon atoms. The carbon chain is numbered to give the amine group the lowest possible number.

### Step 3: Number the Carbon Atoms
Number the carbon atoms in the chain:
- The first carbon (C1) is attached to the amine group.
- The second carbon (C2) is in the middle.
- The third carbon (C3) is at the end.

```
1 - NH2
2 - CH
3 - CH3
```

### Step 4: Identify the Parent Chain
The parent chain is the longest continuous chain of carbon atoms, which in this case is propane (3 carbon atoms).

### Step 5: Name the Functional Group
The functional group present is an amine (–NH2). Since it is attached to the second carbon in the chain, we indicate its position in the name.

### Step 6: Combine the Information
Combining the information from the previous steps, we have:
- The parent chain is propane.
- The amine group is located at the second carbon.

Thus, the IUPAC name of isopropylamine is **propane-2-amine**.

### Final Answer:
The IUPAC name of isopropylamine is **propane-2-amine**.

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