Draw the cis and trans structures of hex-2-ene. Which isomer will have higher b.p. and why?

Explanation

The structures of cis-Hex-2-ene and trans-Hex-2-ene are:


cis-Hex-2-ene has a higher dipole moment than trans-Hex-2-ene. Because of higher dipole moment, cis-Hex-2-ene willhave a stronger dipole-dipole interaction as compared to trans-Hex-2-ene. Hence, cis-Hex-2-ene will have higher boiling point