Question

Why is optical isomerism not common in square planar complexes?

Answer 1

1. Optical isomerism is rare in square planar complexes due to their high symmetry.
2. The symmetry often results in the complex being achiral, meaning its mirror image is superimposable.
3. Square planar complexes typically have a mirror plane that makes them symmetrical, preventing optical isomerism.
4. However, if the ligands are asymmetric (like bidentate ligands), chirality can be introduced, leading to optical isomerism. For example, [Ni(en)₃]²⁺, where en (ethylenediamine) is bidentate, can show optical isomerism.
5. In summary, square planar complexes do not commonly exhibit optical isomerism unless asymmetric ligands are involved.