Write structure formulae and names of four possible aldol condensation products form propanal and butanal. In each case. Indicate which aldehyde acts as nucleophile and which as electrophile.

Explanation

To solve the problem of writing the structural formulae and names of four possible aldol condensation products formed from propanal and butanal, we will follow these steps:

### Step 1: Identify the Aldehydes
We have two aldehydes:
- Propanal (CH3CH2CHO)
- Butanal (CH3CH2CH2CHO)

### Step 2: Aldol Condensation Mechanism
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