Isomerism and StereochemistryhardMCQ SINGLE⭐ Must-Do

When thermodynamically comparing the macroscopic physical properties of standard Cis and Trans geomeIsomerism and Stereochemistry Chemistry Question

Question

When thermodynamically comparing the macroscopic physical properties of standard Cis and Trans geometrical isomers, which isomer typically exhibits the significantly higher melting point, and why?

Answer: B

💡 Solution & Explanation

Melting point heavily depends on solid-state packing efficiency. Trans isomers feature substituents symmetrically opposed across the double bond, granting them a highly linear and symmetrical profile. This allows them to pack extremely efficiently into a robust crystalline lattice, resulting in strong intermolecular crystal forces and a higher melting point than the bulky, poorly packing cis isomers.

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