Question:
The crystal field splitting energy $ (CFSE) $ for $ [CoCl_{6}]^{4-} $ is about $ 18000 \, cm^{-1} $ What would be the $ CFSE $ value of $ [CoCl_{4}]^{2-} $ ?
The crystal field splitting energy $ (CFSE) $ for $ [CoCl_{6}]^{4-} $ is about $ 18000 \, cm^{-1} $ What would be the $ CFSE $ value of $ [CoCl_{4}]^{2-} $ ?
Updated On: Jun 14, 2022
- $ 18000\, cm^{-1} $
- $ 8000\, cm^{-1} $
- $ 16000\, cm^{-1} $
- $ 2000\, cm^{-1} $
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The Correct Option is B
Solution and Explanation
The crystal field energy of tetrahedral and octahedral complex are related as : $\Delta_{t} =\frac{4}{9} \Delta_{o} $
Given : $\Delta_{o}=18000\, cm^{-1}$
$\therefore \Delta_{t}=\frac{4}{9}\times18000 \,cm^{-1}$
$\Delta_{t}=8000 \,cm^{-1}$
Given : $\Delta_{o}=18000\, cm^{-1}$
$\therefore \Delta_{t}=\frac{4}{9}\times18000 \,cm^{-1}$
$\Delta_{t}=8000 \,cm^{-1}$
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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.