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Question: Answered & Verified by Expert
Amongst the following, the most stable complex is
ChemistryCoordination CompoundsNEET
Options:
  • A [Fe(H2O)6]3+
  • B [Fe(NH3)6]3+
  • C [Fe(C2O4)3]3-
  • D [FeCl6]3-
Solution:
1300 Upvotes Verified Answer
The correct answer is: [Fe(C2O4)3]3-
In all these complexes, Fe is in +3 oxidation state. However, the complex ([Fe(C2O4)3]3-) is a chelate because three C 2 O 4 2 - ions act as the chelating ligands. Thus, the most stable complex is [Fe(C2O4)3]3-.

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