Question:
Coordination number of Fe in \([Fe(C_2O_4)_3]^{3-}\) is :
Coordination number of Fe in \([Fe(C_2O_4)_3]^{3-}\) is :
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In coordination complexes, the coordination number is determined by the number of bonds formed between the central metal ion and its ligands.
Updated On: Jan 14, 2026
- 6
- 3
- 4
- 5
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The Correct Option is C
Solution and Explanation
The coordination number of a central metal atom in a coordination compound refers to the number of ligand donor atoms bonded directly to the metal. In the compound [Fe(C2O4)3]3-, the ligand oxalate (C2O4) is bidentate, meaning it can form two bonds with the metal atom. Since there are three oxalate ligands, each contributing two donor atoms bound to the iron (Fe), the total coordination number for Fe is calculated as follows:
| Ligand Type | Number of Ligands | Donor Atoms Per Ligand | Total Donor Atoms |
|---|---|---|---|
| Oxalate (C2O4) | 3 | 2 | 3 × 2 = 6 |
Hence, coordination number of Fe in [Fe(C2O4)3]3- is 6.
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