Question Detail

CHM 102 Practice Questions Objective Question

Question

How do the melting points of trans isomers compare to the cis isomers for alkenes?
Options
A cis isomers have higher melting points
B trans isomers have higher melting points
Correct Answer
C both have similar melting points
D no consistent trend is observed
Correct Answer

Option B is the correct answer.

Detailed Explanation

Trans isomers generally have higher melting points than cis isomers because trans isomers are more symmetric and pack more efficiently in the crystal lattice, leading to stronger intermolecular forces.

Hint

Which isomer packs better in the solid state?

Question Info