Question

multiple choice 2 points
which line - angle formula corresponds to the chair conformation shown below?
i
iv
ii
iii
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Explanation:

Step1: Identify group positions

In the chair - conformation, the ethyl group ($\text{CH}_2\text{CH}_3$) and bromine ($\text{Br}$) are in trans - positions. In IV, the dashed and wedged bonds show that the two substituents are trans to each other.

Step2: Check other options

In I and II, the substituents are cis (both on the same side). In III, the bond - line representation does not match the relative positions of the groups in the given chair - conformation.

Answer:

IV