Write the structural formulae of all the amines with molecular formula `C_(2)H_(7)N`.

Explanation

To find the structural formulae of all the amines with the molecular formula C2H7N, we need to consider the different types of amines: primary (1°), secondary (2°), and tertiary (3°). However, in this case, we will find that only primary and secondary amines are possible due to the limitation of carbon atoms.

### Step 1: Identify the Primary Amines
A primary amine has one nitrogen atom bonded to one carbon atom and two hydrogen atoms.

- For C2H7N, the primary amine can be represented as:
- Ethylamine (or ethanamine):
- Structure:
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