[Fe(CN)6]3– should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization energy for this complex is (–) _____ Δ0. (Nearest integer)
Correct Answer: 2
Solution and Explanation
In [Fe(CN)6]3–, Fe is present in (+3) oxidation state Fe(III)
\(⇒\) inner orbital complex
\(⇒\) d 5(with pairing)
Configuration \(⇒\)\(t_{2g}^5\)
\(\text{CFSE} = \frac{5 \times (-2)}{5} \Delta_0\)
\(=\text{CFSE} = -2\Delta_0\)
So, the answer is 2.
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Concepts Used:
Coordination Compounds
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.