28.4.2—The overall polarity of complexes such

A complex is overall polar when its bond or ligand dipoles do not cancel as vectors. The metal–ligand bonds may be polar individually, but symmetry and three-dimensional arrangement determine the net dipole.

Draw or inspect the geometry before deciding. Opposite equal dipoles can cancel in a symmetric arrangement; cis/trans changes or different ligands can destroy that cancellation.

A trans square-planar complex with matching opposite ligands can have cancellation that its cis isomer lacks. An octahedral complex with six identical ligands is more symmetric than one containing different ligand types.

Do not infer polarity from the overall ionic charge or from one polar bond. Charge and molecular dipole are different properties, and a charged complex can still have zero net dipole.