Question:
In which of the following octahedral complexes of Co (At. no. 27), will the magnitude of $\Delta_{0}$ be the highest?
In which of the following octahedral complexes of Co (At. no. 27), will the magnitude of $\Delta_{0}$ be the highest?
Updated On: Apr 26, 2024
- $[Co(CN)_6]^{3-}$
- $[Co(C_2O_4)_3]^{3-}$
- $[Co(H_2O)_6]^{3+}$
- $[Co(NH_3)_6]^{3+}$
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The Correct Option is A
Solution and Explanation
Spectrochemical series. According to the strength of splitting is as :
$CO > CN^{-} > NO^{-}_{2} > en > NH_{3} > py > NCS^{-}$
$> H_{2}O > O^{2-} > oX^{2-} > OH^{-} > F > Cl^{-}$
$ > SCN^{-} > S^{2-} > Br^{-} > I^{-}$
Crystal field stabilisation energy (CFSE) foroctahedral complex, $\Delta^{\circ}$ depends on the strengthof negative ligand. [Higher the strength morewill be the CFSE]
$CO > CN^{-} > NO^{-}_{2} > en > NH_{3} > py > NCS^{-}$
$> H_{2}O > O^{2-} > oX^{2-} > OH^{-} > F > Cl^{-}$
$ > SCN^{-} > S^{2-} > Br^{-} > I^{-}$
Crystal field stabilisation energy (CFSE) foroctahedral complex, $\Delta^{\circ}$ depends on the strengthof negative ligand. [Higher the strength morewill be the CFSE]
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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.