Q. Which of the following has higher dipole moment; cis--butene or trans--butene?
Solution:
cis-form of alkene is found to be more polar than trans-form. e.g. dipole moment of cis-but-2-ene is Debye, whereas dipole moment of the trans form is almost zero or it can be said that trans-but-2-ene is non-polar as shown below :
