what product would you expect to obtain from addition of Cl2 to 1,2-dimethylcyclohexene?
To determine the product of adding Cl2 to 1,2-dimethylcyclohexene, we need to consider the mechanism of the reaction, as well as the reactivity of the starting materials. In this case, we are dealing with an electrophilic addition reaction.
1,2-dimethylcyclohexene is an alkene, which is a double bond-containing compound, and Cl2 is a diatomic molecule known as chlorine gas.
When Cl2 reacts with an alkene in the presence of an appropriate catalyst or under certain reaction conditions, it undergoes a reaction called halogenation. In this reaction, one Cl2 molecule will be cleaved to form two chlorine radicals (Cl•).
The reaction proceeds through a radical mechanism, as follows:
Step 1: Initiation:
Cl2 → 2 Cl•
Step 2: Propagation steps:
Cl• + 1,2-dimethylcyclohexene → 1-chloro-2-methylcyclohexane (major product)
Cl• + 1,2-dimethylcyclohexene → 1-chloro-2,2-dimethylcyclohexane (minor product)
Step 3: Termination:
Cl• + Cl• → Cl2
In this reaction, two possible products are formed: 1-chloro-2-methylcyclohexane and 1-chloro-2,2-dimethylcyclohexane. The major product is 1-chloro-2-methylcyclohexane, while the minor product is 1-chloro-2,2-dimethylcyclohexane.
Therefore, when Cl2 is added to 1,2-dimethylcyclohexene, the expected product is mainly 1-chloro-2-methylcyclohexane, with a smaller amount of 1-chloro-2,2-dimethylcyclohexane.