Question:
Identify the coordination number of aluminium in potassium trioxalatoaluminate(III).
Identify the coordination number of aluminium in potassium trioxalatoaluminate(III).
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Bidentate ligand:
Each ligand donates 2 sites
Updated On: May 8, 2026
- 2
- 4
- 6
- 12
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The Correct Option is C
Solution and Explanation
Concept: Oxalate ($\text{C}_2\text{O}_4^{2-}$) is a bidentate ligand.
Step 1: Count ligands. \[ \text{[Al(C}_2\text{O}_4)_3]^{3-} \] 3 oxalate ligands present.
Step 2: Each oxalate gives 2 donor atoms. \[ \text{Coordination number} = 3 \times 2 = 6 \]
Step 3: Conclusion.
Coordination number = 6 Final Answer: Option (C)
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