Question

Which is the most stable structure of 1-isopropyl-4-methylcyclohexane?​

Answer 1

Answer:

Here, in case of 1-chloro-4-methylcyclohexane, CH3 and Cl are when placed at equatorial position in chair form of cyclohexane, is most stable.

Answer 2

The most stable structure of 1-isopropyl-4-methyl cyclohexane is trans-1-isopropyl-4-methyl cyclohexane.

• Cyclohexane exists in chair form to attain greater stability.
• 1-isopropyl-4-methyl cyclohexane in its trans structure exists as equatorial equatorial or (e, e) conformation. In trans conformation, the two groups present in an equatorial position which decreases the steric repulsion and butane gauche interaction. Thus this form has the lowest energy and it is most stable.