For the reaction below identify the reactant electrophile and the nucleophile. FO: H30* H 5.- H₂O

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### Reaction Overview

**Task:** For the reaction below, identify the reactant electrophile and the nucleophile.

### Reactants:

1. **Cyclopentanone (C5H8O):** 
   - Structure: A five-membered carbon ring with a carbonyl group (C=O).
   - Oxygen is depicted with two lone pairs.
   
2. **Hydronium Ion (H3O⁺):**
   - Structure: A water molecule with an additional hydrogen ion, forming H3O⁺.
   - Oxygen is bonded to three hydrogens and carries a positive charge.

### Reaction:

- An arrow indicates the direction of the reaction from reactants to products.

### Products:

1. **Protonated Cyclopentanone:**
   - Structure: The carbonyl oxygen is now bonded to an additional hydrogen, resulting in a positive charge on the oxygen.
   - The structure remains as a five-membered carbon ring with the newly added hydrogen atom.

2. **Water (H2O):**
   - Structure: Two hydrogens bonded to an oxygen atom, neutral charge.

### Explanation of Reaction:

- **Electrophile:** The hydronium ion (H3O⁺) acts as an electrophile, providing a proton (H⁺) to the nucleophile.
- **Nucleophile:** The oxygen atom in the carbonyl group of cyclopentanone acts as a nucleophile, using its lone pairs to attack the electrophile.

This reaction exemplifies an acid-catalyzed addition, where the nucleophilic carbonyl oxygen attacks the electrophilic proton from the hydronium ion, leading to the formation of protonated cyclopentanone and water.
Transcribed Image Text:### Reaction Overview **Task:** For the reaction below, identify the reactant electrophile and the nucleophile. ### Reactants: 1. **Cyclopentanone (C5H8O):** - Structure: A five-membered carbon ring with a carbonyl group (C=O). - Oxygen is depicted with two lone pairs. 2. **Hydronium Ion (H3O⁺):** - Structure: A water molecule with an additional hydrogen ion, forming H3O⁺. - Oxygen is bonded to three hydrogens and carries a positive charge. ### Reaction: - An arrow indicates the direction of the reaction from reactants to products. ### Products: 1. **Protonated Cyclopentanone:** - Structure: The carbonyl oxygen is now bonded to an additional hydrogen, resulting in a positive charge on the oxygen. - The structure remains as a five-membered carbon ring with the newly added hydrogen atom. 2. **Water (H2O):** - Structure: Two hydrogens bonded to an oxygen atom, neutral charge. ### Explanation of Reaction: - **Electrophile:** The hydronium ion (H3O⁺) acts as an electrophile, providing a proton (H⁺) to the nucleophile. - **Nucleophile:** The oxygen atom in the carbonyl group of cyclopentanone acts as a nucleophile, using its lone pairs to attack the electrophile. This reaction exemplifies an acid-catalyzed addition, where the nucleophilic carbonyl oxygen attacks the electrophilic proton from the hydronium ion, leading to the formation of protonated cyclopentanone and water.
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