Chemistry - Coordination Chemistry Question with Solution | TestHub

In both complexes Fe is in +3 oxidation state.
F^-ion  is weak field ligand so no pairing of electrons in inner 3d-orbitals & outer orbital complex. sp³d²hybridisation is formed.


have 5 unpaired electrons, so paramagnetic

${\mathrm{\mu }}_{{\left[{\mathrm{FeF}}_6\right]}^{-3}}=\sqrt{5(5+2)}=\sqrt{35 }\text{B}.\text{M}$
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One unpaired Electron, CN^-ion strong ligand field. So will pair the d-orbital electrons & form inner orbital hybridization d²sp³.

${\text{μ}}_{{\left[\text{Fe}{\left(\text{CN}\right)}_6\right]}^{3-}}=\sqrt{1\left(1+2 \; \right)}$(1 unpaired e^-so para magnetic)

$=\sqrt{3}B.M$.