Geometrical Isomerism
Geometrical isomerism is possible in:
Select the correct option:
Solution
Square planar complexes with formula MA₂B₂
Geometrical Isomerism (cis-trans) requires different relative orientations of ligands.
- Tetrahedral complexes: All bond angles are 109.5∘ and all positions are adjacent to each other. Geometric isomerism is NOT possible.
- Square Planar complexes (MA2B2): Positions can be adjacent (90∘ apart, cis) or opposite (180∘ apart, trans).
- Example: [Pt(NH3)2Cl2] exists as cisplatin (antitumour) and transplatin.
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Number of geometrical isomers possible for [Pt(NH3)2Cl2] (square planar):
Number of geometrical isomers possible for [Pt(NH3)2Cl2] (square planar):
About This Question
- Subject
- chemistry
- Chapter
- coordination compounds
- Topic
- geometrical isomerism
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Square planar complexes with formula MA₂B₂
Geometrical Isomerism (cis-trans) requires different relative orientations of ligands.
- Tetrahedral complexes: All bond angles are 109.5∘ and all positions are adjacent to each other. Geometric isomerism is NOT possible.
- Square Planar complexes (MA2B2): Positions can be adjacent (90∘ apart, cis) or opposite (180∘ apart, trans).
- Example: [Pt(NH3)2Cl2] exists as cisplatin (antitumour) and transplatin.
This medium difficulty chemistry question is from the chapter coordination compounds, covering the topic of geometrical isomerism. It appeared in the 2025 exam.
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