Geometrical Isomerism

Question

Geometrical isomerism is possible in:

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**Geometrical Isomerism** (cis-trans) requires different relative orientations of ligands.
- **Tetrahedral complexes**: All bond angles are $109.5^\circ$ and all positions are adjacent to each other. Geometric isomerism is **NOT** possible.
- **Square Planar complexes ($MA_2B_2$)**: Positions can be adjacent ($90^\circ$ apart, **cis**) or opposite ($180^\circ$ apart, **trans**).
- Example: $[Pt(NH_3)_2Cl_2]$ exists as cisplatin (antitumour) and transplatin.

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Geometrical Isomerism

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More geometrical isomerism Practice Questions

Number of geometrical isomers possible for [Pt(NH3)2Cl2] (square planar):

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