Question

Question: What product would you expect to obtain from addition of to 1,2-dimethyl-cyclohexene? Show the stereochemistry of the product.

Short answer

Answer

The product obtained is,

Step-by-step solution

Halogenation of alkene

In the halogenation of alkene, bromine and chlorine adds rapidly and give 1,2-dihalides.When halogenations occur in cycloalkene, only trans stereoisomers are formed by dihalide addition.

The product obtained from the addition of Cl2to 1, 2-dimethyl-cyclohexene

The addition of${\mathrm{Cl}}_2$to a cycloalkene takes place by the electrophilic addition of ${\mathrm{Cl}}^{+}$to the alkene, forming a carbocation intermediate. On further reaction with ${\mathrm{Cl}}^{-}$, dichloride addition product is obtained. The chlorines are tans to one another like methyl groups.

Formation of product from the addition of ${\mathrm{Cl}}_2$to 1,2-dimethyl-cyclohexene