Question:
The spin-only magnetic moment of $\left[crF_{6}\right]^{4-}$ (atomic number of Cr is 24) is
The spin-only magnetic moment of $\left[crF_{6}\right]^{4-}$ (atomic number of Cr is 24) is
Updated On: Feb 15, 2024
- 0
- 1.73 BM
- 2.83 BM
- 4.9 BM
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The Correct Option is D
Solution and Explanation
$_{24}Cr=\left[Ar \right]3d^{5} 4s^{1}, Cr^{2+}$
F- is a weak field ligand, $\bigtriangleup_{0} < P, No \,\, pairing$
$\left[CrF_{6}\right]^{-4}=$
No. of unpaired $\overline{e}$ =4, Spin only magnetic moment $\left(\mu\right)$
$=\sqrt{n\left(n+2\right)}=\sqrt{4\times6} =\sqrt{24} =4.9 BM$
F- is a weak field ligand, $\bigtriangleup_{0} < P, No \,\, pairing$
$\left[CrF_{6}\right]^{-4}=$
No. of unpaired $\overline{e}$ =4, Spin only magnetic moment $\left(\mu\right)$
$=\sqrt{n\left(n+2\right)}=\sqrt{4\times6} =\sqrt{24} =4.9 BM$
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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.