Isomerism and StereochemistryhardMCQ SINGLE

When physically comparing the melting points of standard cis and trans geometrical isomers, which coIsomerism and Stereochemistry Chemistry Question

Question

When physically comparing the melting points of standard cis and trans geometrical isomers, which configuration generally exhibits the higher melting point, and what is the dominant structural reason?

Answer: B

💡 Solution & Explanation

Melting point largely depends on packing efficiency within a solid crystalline lattice structure. Trans isomers have terminal groups on opposite sides, making them highly linear and structurally symmetrical. This high symmetry allows the molecules to pack together very efficiently with significantly fewer voids compared to the bulky, 'U-shaped' cis isomers, leading to higher melting points.

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