IGNOU BCHCT 131 2026 - Draw the energy profile for various confirmations exhibited by cyclohe

Question

Draw the energy profile for various confirmations exhibited by cyclohexane. Also explain the relative energies of various conformations.

01 Dec 2025

Answer :

Word Count : 250

An unsubstituted cyclohexane has several important conformations whose relative energies produce a characteristic energy profile. The most stable conformation is the chair, which minimizes torsional strain by having all C–H bonds staggered and eliminates angle strain by approximating 109.5°. A chair converts to the equivalent chair through a series of higher-energy states: half-chair (highest), then twist-boat and boat intermediates. The half-chair is a transition state with severe angle and torsional strain. The boat conformation suffers steric strain from flagpole interactions between hydrogen atoms across the concave face and

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