Q. 4-4-13P - Organic Chemistry (Mcmurry)

Question

Draw two different chair conformations of trans-1,4 dimethylcyclohexane, and label all positions as axial or equatorial.

Step-by-Step Solution

Answer

The two different chair conformations of trans-1,4 dimethylcyclohexane are:

       

 

Chair confirmation

Chair conformation structure for a six-membered ring is when atoms 2, 3, 5, and 6 lie in the same plane, atom one lies above the plane, and atom 4 lies below the plane.

Axial and equatorial positions

Axial bonds are the bonds that are perpendicular or vertical to the ring plane. Equatorial bonds are approximately horizontal in the plane of the ring.

Structure of trans-1,4 dimethylcyclohexane: Axial

The two methyl groups and four hydrogens present are perpendicular or vertical to the ring plane.

                                 

                                  The bond in pink represents axial bonds 

                                    

Structure of trans-1,4 dimethylcyclohexane- equatorial

Here two methyl groups and four hydrogens are present approximately horizontal in the ring plane.

                             

                               The bond in pink represent equatorial bonds