Cis-trans Isomerism

6. Effect of Polarity on Boiling Point

Cis-isomer Trans-isomer

Effect on boiling point:
Boiling involves overcoming the stronger permanent dipole - permanet dipole attractions between molecules.

o More energy is needed to separate
the molecules
o Higher boiling point

Effect on boiling point:

Boiling involves overcoming the
weaker induced dipole - induced dipole attractions between molecules.

o Less energy is needed to separate the molecules
o Lower boiling point