Chemistry - CHEMICAL BONDING Question with Solution | TestHub

In square planar complexes like these, the trans-isomer is centrosymmetric.

In option (B), the two Cl ligands are opposite each other, and the two PR₃ ligands are opposite each other.

Because the identical groups are at $180^{\circ }$, their dipole vectors point in opposite directions and exactly cancel out ($\mu =0$).

Options (A) and (C) represent cis-isomers where the dipoles reinforce each other, resulting in a net dipole moment.