The compound(s) that exhibit(s) geometrical isomerism is (are) :

Question

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Geometrical isomerism is shown when different spatial arrangements of ligands are possible around a central metal ion (commonly in square planar or octahedral complexes).

(d) $[Pt (N H_{3})_{2} C l_{2}]$ is a square planar complex and shows cis–trans isomerism.

(c) $[Pt (e n)_{2} C l_{2}] C l_{2}$ is an octahedral Pt(IV) complex and can show geometrical isomerism due to different positions of Cl⁻ and ethylenediamine ligands.

In (a) and (b), geometrical arrangement is fixed due to ligand symmetry, so no such isomerism occurs.

Hence, the correct answer is (c) and (d).

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