Answer
The more stable chair is the second one.
Work Step by Step
1. Draw both chairs with the substituents.
- We've learned how to do this on the previous sections.
2. Find the largest substituent.
- In this case the isopropyl is the largest (The one with 3 carbons).
3. Now, identify the chair where the largest group is in the equatorial position.
- In the second chair, the isopropyl is in the equatorial position, so it is the more stable.
