Question:medium
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: Feb 25, 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 is defined as the count of ligand donor atoms directly bonded to the metal. For the compound [Fe(C2O4)3]3-, the oxalate ligand (C2O4) is bidentate, signifying its capacity to form two bonds with the metal atom. With three oxalate ligands present, each contributing two donor atoms to the iron (Fe), the total coordination number for Fe is determined as follows:
| Ligand Type | Number of Ligands | Donor Atoms Per Ligand | Total Donor Atoms |
|---|---|---|---|
| Oxalate (C2O4) | 3 | 2 | 3 × 2 = 6 |
Therefore, the coordination number of Fe in [Fe(C2O4)3]3- is 6.
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