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In which of the following coordination entities the magnitude of $\Delta_0$ (CFSE in octahedral field) will be maximum? (At. no. of Co = 27)
In which of the following coordination entities the magnitude of $\Delta_0$ (CFSE in octahedral field) will be maximum? (At. no. of Co = 27)
Updated On: May 4, 2024
- ${[Co (H20)6]^{3+}}$
- $[Co(NH_3)_6]^{3+}$
- $[Co (CN)_6]^{3-}$
- $[Co(C_2O_4)_3]^{3-}$
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The Correct Option is C
Solution and Explanation
As in all the given complex the central metal atom is same and contains same number of d electrons, thus $CFSE$ is decided by ligands. In case of strong field ligand, $CFSE$ is maximum. $CN^-$ is a strong field ligand, Hence, in $[Co(CN)_6 ]^{3-}CFSE$ is maximum. The magnitude of$\Delta_{oct}$ will be maximum in $[Co(CN)_6 ]^{3-}.$
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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.
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