Question

multiple choice 2 points sketch the chair conformations for the compound shown below. label the structures as cis or trans.

Explanation:

Step1: Recall cis - trans isomerism rules

Cis means same - side, trans means opposite - side for substituents on a ring.

Step2: Examine the given structures

Check the relative positions of Cl and Br in each chair - conformation pair.

Step3: Identify the cis - isomer

The structure where Cl and Br are on the same side of the ring is the cis - isomer.

Answer:

In a cis - isomer, the two substituents are on the same side of the ring, and in a trans - isomer, the two substituents are on opposite sides of the ring. Looking at the given compound with chlorine (Cl) and bromine (Br) substituents on a cyclohexane ring in chair - conformations:

• The second option (labeled cis) is correct. In this structure, both the Cl and Br substituents are on the same side of the cyclohexane ring in the chair - conformations.