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trans-But-2-ene has higher melting point...

trans-But-2-ene has higher melting point than cis-But-2-ene. Explain.

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trans-but-2-ene has higher melting point than cis-but-2-ene. It is because the molecules of trans-but-2-ene are more symmetrical than cis-but-2-ene. These are more closely packed in the crystal lattice. Therefore, more energy is required to break the crystal lattice. Hence, trans-but-2-ene has higher melting point.
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