Why do nucleophiles `(Nu^(overset(..)Θ))` add to the `(C=C)` of `alpha-beta`-unsaturated carbonyl compounds but not to alkenes ?

Explanation

To understand why nucleophiles add to the carbon-carbon double bond of alpha-beta-unsaturated carbonyl compounds but not to alkenes, we can break down the explanation into several steps:

### Step 1: Understanding Alpha-Beta Unsaturated Carbonyl Compounds
Alpha-beta unsaturated carbonyl compounds have a carbon-carbon double bond (C=C) adjacent to a carbonyl group (C=O). The structure can be represented as R-CH=CH-C(=O)-R', where R and R' are alkyl groups.

### Step 2: Nucleophilic Attack on Alpha-Beta Unsaturated Carbonyl Compounds
When a nucleophile (Nu⁻) approaches an alpha-beta unsaturated carbonyl compound, it can attack the carbon-carbon double bond. This results in the formation of a carbanion (C⁻) at the beta position. The electron density from the double bond shifts towards the carbonyl oxygen, creating a resonance-stabilized carbanion.

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