Use strain energy increments in the OWL Table Reference (see References button, Strain Energy Increments) to calculate the energy difference between the two chair conformations of the compound below: b. Specify substituent positions (axial or equatorial) in the more stable chair. Estimate the percent of the more stable chair at equilibrium at 25°C (To determine the percent of the more stable chair at equilibrium, first calculate Keq; and then use this value to find the percentage).
CH3
HaC
Answers:
The energy difference is kJ/mol. b. In the more stable chair: The methyl group is in the axial position. The isopropyl group is in the equatorial position. At 25°C, the equilibrium percent of the more stable chair conformation is approximately.
CHa