Would you expect benzaldehyde to be more reactive or less reactive in nucleophilic addition reactions than propanal? Explain your answer.

Explanation

To determine whether benzaldehyde is more or less reactive in nucleophilic addition reactions compared to propanal, we can analyze the structures and properties of both compounds.

### Step 1: Understand the Structures
- **Benzaldehyde** has the structure C6H5CHO, where the carbonyl group (C=O) is attached to a benzene ring.
- **Propanal** has the structure CH3CH2CHO, where the carbonyl group is attached to a straight-chain alkane.

### Step 2: Electrophilicity of the Carbonyl Carbon
- The reactivity of aldehydes in nucleophilic addition reactions is largely determined by the electrophilicity of the carbonyl carbon.
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