Which one of the following octahedral complexes will not show geometric isomerism? ( A and B are monodentate ligands)

Step-by-step solution

Geometric isomerism occurs in octahedral complexes when there are at least two different types of ligands or when there is a bidentate ligand present. Geometric isomerism is not possible when all ligands are the same type and are monodentate. In such cases, the ligands can only occupy adjacent positions in the octahedral coordination sphere. Among the options given: (1) ( [M A₂ B₄ ] ) has two types of ligands ( (A ) and (B )), so it can exhibit geometric isomerism. (2) ( [M A₃ B₃ ] ) has two types of ligands ( (A )