Final answer:
The chair conformation of trans-1,2-dimethylcyclohexane is stable and influences the stability and reactivity of the molecule. The equatorial position of the bulky methyl groups minimizes steric repulsion and increases stability. The chair conformation also enhances reactivity by providing more accessible reactive sites.
Step-by-step explanation:
The chair conformation of trans-1,2-dimethylcyclohexane is a stable conformation in which the bulky methyl groups are positioned in the equatorial positions. In this conformation, the steric repulsion between the methyl groups is minimized, leading to increased stability. The chair conformation also influences the reactivity of the molecule by affecting the accessibility of the reactive sites. The equatorial positions are more accessible for reactions, making the chair conformation more reactive compared to the boat conformation.