The number of isomeric amines possible for the formula `C_(3)H_(9)N`

Options

A. 3
B. 4
C. 5
D. 6

Answer

To determine the number of isomeric amines possible for the formula \( C_3H_9N \), we can follow these steps:

### Step 1: Identify the structure of the amines
Amines can be classified into primary, secondary, and tertiary amines based on the number of carbon atoms attached to the nitrogen atom. For the formula \( C_3H_9N \), we will consider all possible structural arrangements of the carbon and nitrogen atoms.

### Step 2: Count the carbon atoms and nitrogen atom
We have:
- 3 Carbon atoms (C)
- 9 Hydrogen atoms (H)
- 1 Nitrogen atom (N)

### Step 3: Determine the possible types of amines
1. **Primary amines**: The nitrogen atom is attached to one carbon atom.
2. **Secondary amines**: The nitrogen atom is attached to two carbon atoms.
3. **Tertiary amines**: The nitrogen atom is attached to three carbon atoms.

### Step 4: Draw the structural isomers
1. **Primary amines**:
- **Isomer 1**: \( H_2N-CH_2-CH_2-CH_3 \) (Propylamine)
- **Isomer 2**: \( H_2N-CH(CH_3)-CH_3 \) (Isopropylamine)

2. **Secondary amines**:
- **Isomer 3**: \( CH_3-CH(NH_2)-CH_3 \) (Dimethylamine)
- **Isomer 4**: \( CH_3-CH_2-NH-CH_3 \) (Ethylmethylamine)

3. **Tertiary amines**:
- **Isomer 5**: \( (CH_3)_3N \) (Trimethylamine)

### Step 5: Count the total number of isomers
Now we can list the isomers we have identified:
1. Propylamine (Primary)
2. Isopropylamine (Primary)
3. Dimethylamine (Secondary)
4. Ethylmethylamine (Secondary)
5. Trimethylamine (Tertiary)

### Conclusion
In total, we have identified **5 isomeric amines** for the formula \( C_3H_9N \).

### Final Answer
The number of isomeric amines possible for the formula \( C_3H_9N \) is **5**.

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