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.
Which of the following is not possible ?

Options

A. `Trans-[Pt(NH_(3))_(2)Cl_(2)]`
B. `Cis-[Pt(gly)_(2)]`
C. `Trans-[PtCl_(2)(gly)]^(-)`
D. `Trans-[Pt(gly)_(2)]`

Answer

C,

Explanation

Bidentate ligands can so-ordinate through adjacent position only.