JEE 2021 | Geometrical Isomerism in CN=6(Bidentate Ligands)

Bidentate ligands are

Which one is bidentate ligand?

Which is not a bidentate ligand?

An example of bidentate ligand is

Geometrical and Optical Isomerism in Complex having CN 6

All these complexes are square planar about Pt^(II) .Square planar complexes show geometrical isomerism provided ligands are proper. A bidentate ligand (like ethylenediamine, glycinato) does not attach itself in anti-position. If the ligands present in square planar complexes do not contain chiral or asymmetric center, such complexes do not show optical isomerism due to presence of plane of symmetry. Geometrical isomerism is exhibited by

Assertion : Tetrahedral complexes having two different types of unidentate ligands coordinated with central metal ion will show geometrical isomerism . Reason : Geometrical isomerism arises in homoleptic complexes due to different possible geometric arrangement of the ligands .

Which of the following exhibit geometrical isomerism (M stands for a metal, and a and b are ligands)?