Write all the geometrical isomers of `[Pt(NH_3)(Br)(Cl)(py)]` and how many of these will exhibit optical isomers?

Explanation

Three isomers of `[Pt(NH_(3))(Br)(Cl)(Py)]` are possible

These are obtained by keeping the position of one of the ligand say `NH3` fixed and rotating the positions of others This type of isomers do not show any optical isomerism optical isomerism only rarely occurs in square planar or tetrahedral complexes and that too when they contain unsymmetrical chelating ligand.