Question Detail

CHM 102 Practice Questions Objective Question

Question

Why do trans isomers of alkenes have lower boiling points than cis isomers?
Options
A trans isomers have better symmetry
B cis isomers have better symmetry
C trans isomers are less polar
Correct Answer
D cis isomers are less polar
Correct Answer

Option C is the correct answer.

Detailed Explanation

Cis isomers are more polar (have a net dipole moment) than trans isomers, which are often nonpolar or less polar. The stronger dipole-dipole interactions in cis isomers lead to higher boiling points.

Hint

How does polarity affect boiling points of cis and trans isomers?

Question Info