$[Fe(H_{2}O ) _{6}]^{3+}$ is strongly paramagnetic whereas $[Fe(CN)_{6}]^{3-}$ is weakly paramagnetic.
$H_{2}O$ is a weak field ligand and $CN^{-}$ is a strong field ligand.
Updated On: Jul 6, 2022
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false.
If both assertion and reason are false.
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The Correct Option isA
Solution and Explanation
$\left[ Fe ( CN )_{6}\right]^{3-} \Rightarrow C \ \bar {N} \Rightarrow $ Strong field ligand.
$Fe ^{3+}=[\text{Ar}] 3 d ^{5}($ Refer $o$ image o1)
1. 1 unpaired electrons.
2. Weakly paramagnetic
$\left[ Fe \left( H _{2} O \right)_{6}\right]^{3+} \Rightarrow H _{2} O \Rightarrow$ Weak field ligand.
$\Rightarrow Fe ^{3+} \Rightarrow[ Ar ] 3 d ^{5}$ (Refer o image o2)
5 unpaired electrons.
$\left[ Fe \left( H _{2} O \right)_{6}\right]^{2+}=$ Strong paramagnetic.
A coordination compound holds a central metal atom or ion surrounded by various oppositely charged ions or neutral molecules. These molecules or ions are re-bonded to the metal atom or ion by a coordinate bond.
Coordination entity:
A coordination entity composes of a central metal atom or ion bonded to a fixed number of ions or molecules.
Ligands:
A molecule, ion, or group which is bonded to the metal atom or ion in a complex or coordination compound by a coordinate bond is commonly called a ligand. It may be either neutral, positively, or negatively charged.
