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Coordination Compounds — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryCoordination Compounds1 Mark
MCQ
Amongst the following, the most stable complex is :
  • A
    $[\ce{Fe(H2O)6]^{3+}}$
  • B
    $[\ce{Fe(NH3)6]^{3+}}$
  • ✓
    $[\ce{Fe(C2O4)3]^{3–}}$
  • D
    $[\ce{FeCl6]^{3–}}$
✓

Answer

Correct option: C.
$[\ce{Fe(C2O4)3]^{3–}}$
In each of the given complex$, Fe$ is in $+3$ oxidation state.
As $\ce{C2O4}^{2-}$ is didentate chelating ligand, it forms chelate rings and hence $(c)$ out of complexes given above is the most stable complex.

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