MCQ
The stabilisation of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species?
- A[Fe(CO)5]
- B[Fe(CN)6]3–
- C[Fe(C2O4)3]3–
- D[Fe(H2O)6]3+
✓
Answer
- [Fe(C2O4)3]3–
Explanation:
Chelation (formation of cycle by linkage between metal ion and ligand) stabilizes the coordination compound. The ligand which chelates the metal ion are known as chelating ligand.
Here, only [Fe(C2O4)3]3- is a coordination compound which contains oxalate ion as a chelating ligand. Hence, it stabilizes coordination compound by chelating Fe3+ ion.
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