In the complexes [Fe(H_2 O)_6]^ 3+ ,[Fe(CN)_6]^ 3- , [Fe(C_2 O_4)_3]^ 3- and [FeCl_6]^ 3- , more stability is shown by

Correct answer: B. [Fe (C_2 O_4)_3]^ 3- More basic and chelate forming ligand stabilises the complex to more extent C_2 O_4^ 2- is a bidentate chelating ligand thus stabilises the complex [Fe (C_2 O_4)_3]^ 3- to a high extent.

JIPMER 2015

Exam: JIPMER
Year: 2015
Subject: Chemistry
Chapter: Coordination Compounds

JIPMER 2015 · Chemistry · Coordination Compounds

In the complexes [Fe(H_2 O)_6]^ 3+ ,[Fe(CN)_6]^ 3- , [Fe(C_2...

In the complexes

\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+},\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}

, \left[\mathrm{Fe}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-} and

\left[\mathrm{FeCl}_6\right]^{3-}

, more stability is shown by

Options

A $\left[\mathrm{FeCl}_6\right]^{3-}$
B\left[\mathrm{Fe} $\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$
C\left[\mathrm{Fe} $\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$
D $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$

Correct answer

B. \left[\mathrm{Fe} $\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$

Step-by-step solution

More basic and chelate forming ligand stabilises the complex to more extent

\mathrm{C}_2 \mathrm{O}_4^{2-} is a bidentate chelating ligand thus stabilises the complex \left[\mathrm{Fe}

\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-} to a high extent.

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