Draw the MOST STABLE conformation of cis-1-tert-butyl-4-methylcyclohexane.

• A.
• B.
• C.
• D.

Answer: (B)

Verified step by step guidance

1. Identify the structure of cyclohexane and understand that it can exist in different conformations, primarily chair conformations, which are the most stable due to minimized steric strain.
2. Recognize that in cis-1-tert-butyl-4-methylcyclohexane, both substituents (tert-butyl and methyl) are on the same side of the cyclohexane ring.
3. Consider the size of the substituents: the tert-butyl group is larger than the methyl group, so it should be placed in the equatorial position to minimize steric hindrance.
4. Draw the cyclohexane ring in a chair conformation and place the tert-butyl group in the equatorial position at carbon 1. Since the compound is cis, the methyl group at carbon 4 should also be placed equatorially on the same side of the ring.
5. Verify that both substituents are on the same side (cis) and that the larger group (tert-butyl) is equatorial, ensuring the most stable conformation is achieved.