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 need to analyze the structures and electronic properties of both compounds.

### Step 1: Draw the Structures
- **Benzaldehyde (C6H5CHO)**: It has a carbonyl group (C=O) attached to a benzene ring.
- **Propanal (C3H6O)**: It is a straight-chain aldehyde with the structure CH3-CH2-CHO.

### Step 2: Analyze Electrophilicity
In nucleophilic addition reactions, the nucleophile attacks the electrophilic carbon of the carbonyl group (C=O). The reactivity of aldehydes in these reactions is influenced by the electrophilicity of the carbonyl carbon.
...