Question

Why dipole moment of cis -1, 2-dichloroethane (ClHC= CHCO is greater than that of its Trans

isomer​

Answer 1

Explanation:

Dipole moment vector will in the direction of Electronegative atom.

In cis form, dipole moment vectors adds up to give higher net dipole moment.

Cl Cl

C=C

H H

In trans form, dipole moment vectors in opposite directions gets cancel with each other to give very low net dipole moment as compared to cis form.

Cl H

C= C

H Cl

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