Question:
What will be the geometry and magnetic moment of the complex $ [NiCl_4]^{2-} $ ?
What will be the geometry and magnetic moment of the complex $ [NiCl_4]^{2-} $ ?
Updated On: Jun 8, 2024
- Tetrahedral and $ 3.87 \,B.M $
- Tetrahedral and $ 2.82 \,B.M $
- Square planar and $ 2.82\, B.M $
- Square planar and $ 4.89\, B.M $
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The Correct Option is B
Solution and Explanation
$Ni^{2+} \Rightarrow [Ar] 3d^{8}$
In a weak field ligand, pairing does not take place
So, $[NiCl_{4}]^{2-} : [Ar] $
Thus, geometry is tetrahedral with two unpaired electrons
Magnetic moment $=\sqrt{n\left(n+2\right)}$
$\sqrt{2\left(4\right)}$
$=2.82 \, B.M.$
In a weak field ligand, pairing does not take place
So, $[NiCl_{4}]^{2-} : [Ar] $
Thus, geometry is tetrahedral with two unpaired electrons
Magnetic moment $=\sqrt{n\left(n+2\right)}$
$\sqrt{2\left(4\right)}$
$=2.82 \, B.M.$
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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.