Question

Which of the following has higher dipole moment?

• A.
• B.
• C. Both will have the same dipole moment.
• D. Cannot be predicted.

Answer 1

The correct option is B

In cis-isomers, the same group will locate on the same side of the doubly bonded carbon atoms. So, they will have a resultant dipole moment.

In trans-isomers, the same groups will locate on the opposite side of the doubly bonded carbon. Thus, the dipole will get cancel each other and the resultant dipole moment will be zero.

${\mu }_{cis}>{\mu }_{trans}$
Here, compound (b) is cis-isomer so it has a higher dipole moment.