Which of the following macroscopic physical properties are generally ranked correctly when comparing — Isomerism and Stereochemistry Chemistry Question

💡 Solution & Explanation

The cis-isomer usually has a non-zero resultant dipole moment, making it more polar and giving it a higher boiling point than the non-polar trans-isomer. However, the trans-isomer is more highly symmetric, leading to better crystal packing and a higher melting point. The trans-isomer also has terminal bulky groups on opposite sides, vastly reducing van der Waals steric repulsion, making it thermodynamically more stable.