* Electron Density: The phenoxide ion has a negative charge localized on the oxygen atom. This negative charge increases the electron density of the aromatic ring, making it more susceptible to attack by electrophiles.
* Resonance Stabilization: The negative charge in the phenoxide ion is delocalized through resonance, further increasing the electron density of the ring. This makes the ring more reactive towards electrophiles.
* Inductive Effect: The oxygen atom in the phenoxide ion is more electronegative than the carbon atoms in the ring. This pulls electron density away from the ring, but the negative charge on the oxygen counteracts this effect.
In contrast:
* Phenol: Phenol does not have the negative charge that increases electron density in the ring. It has a hydroxyl group (OH) that is electron-donating, but this effect is less pronounced than the negative charge in the phenoxide ion.
In summary:
The phenoxide ion is more reactive than phenol due to its increased electron density in the aromatic ring, primarily driven by the negative charge and resonance stabilization. This makes the ring more susceptible to attack by electrophiles.
