Learning Path
Question & Answer
Choose the Best Answer
tert-butyl in the equatorial position and ethyl in the axial position
tert-butyl in the axial position and ethyl in the equatorial position
Both groups in equatorial positions
Both groups in axial positions
Understanding the Answer
Let's break down why this is correct
The tert‑butyl group is large and prefers the equatorial position because it has more space and avoids 1,3‑diaxial interactions. Other options are incorrect because Putting the bulky tert‑butyl in the axial position creates large clashes with rings that are close to the chair; Having both groups equatorial seems nice, but it forces the chair to adopt a less favorable tilt.
Key Concepts
Cyclohexane Chair Conformations
hard level question
understand
Deep Dive: Cyclohexane Chair Conformations
Master the fundamentals
Definition
Cyclohexane molecules exhibit chair conformations where axial and equatorial positions determine stability. Chair flips involve interchanging axial and equatorial hydrogens without breaking bonds. The positioning of substituents like methyl groups affects energy levels and steric interactions, impacting molecular stability and reactivity.
Topic Definition
Cyclohexane molecules exhibit chair conformations where axial and equatorial positions determine stability. Chair flips involve interchanging axial and equatorial hydrogens without breaking bonds. The positioning of substituents like methyl groups affects energy levels and steric interactions, impacting molecular stability and reactivity.
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