Question

Cis-trans isomerism is possible in molecules with rings. Draw the cis and trans isomers of 1, 2-dimethyl cyclohexane.

Short answer

The cis and trans isomers of 1,2 -dimethyl cyclohexane are:

cis-1,2-dimethylcyclohexane

trans-1,2-dimethylcyclohexane

Step-by-step solution

Definition of cis-trans isomerism.

Cis–trans isomerism, also known as geometric isomerism or configurational isomerism, is a chemical word that refers to how atoms are arranged inside molecules.

The cis and trans isomers of 1,2-dimethyl cyclohexane.

The cis and trans isomers of 1,2-dimethylcyclohexaneare shown below.

Cyclohexane is a ring-shaped compound with six carbon atoms. The methyl groups should be present next to each other.

• The substituents are on the same sides in the Cis isomer.
• Here, both the methyl groups are above the plane.

cis-1,2-dimethylcyclohexane

• The substituents in the Trans isomerare on the opposite sides.
• One methyl group is above the plane and the other is below the plane.

trans-1,2-dimethylcyclohexane