* Hexene: This is an alkene, meaning it has a carbon-carbon double bond. The double bond is an electron-rich region, making it susceptible to attack by electrophiles.
* Bromine: This is a halogen and a strong electrophile. It is attracted to the electron-rich double bond of hexene.
The Mechanism:
1. Electrophilic attack: The bromine molecule approaches the double bond, and one of the bromine atoms acts as an electrophile, forming a bond with one of the carbon atoms.
2. Carbocation formation: This creates a carbocation intermediate, a positively charged carbon atom.
3. Nucleophilic attack: The other bromine atom, now negatively charged, attacks the carbocation, forming a new carbon-bromine bond.
The Product:
The product of this reaction is 1,2-dibromohexane, where both bromine atoms have added to the carbons that were originally part of the double bond.
Key Points:
* This reaction is a stereospecific reaction, meaning the stereochemistry of the product is determined by the stereochemistry of the starting alkene.
* The reaction requires the presence of a solvent like dichloromethane, which helps to dissolve the bromine and facilitate the reaction.
Let me know if you'd like a more detailed explanation of the mechanism!
