The difference between spin only magnetic moment value of \([Co(H_2O)_6]Cl_2\) and \([Cr(H_2O)_6]Cl_3\) is ________ .
Correct Answer: 2
Solution and Explanation
\(Co → 4s^2 3d^7\)
\(H_2O\) is weak field ligand.
\(CO^{2+}→3d^7\)
\(n=3\)
\(μ_1=\sqrt {n(n+2)}\)
\(μ_1=\sqrt {15}\) B.M.
\(Cr →4s^1 3d^5\)
\(CO^{3+}→3d^3\)
\(n=3\)
\(μ_2=\sqrt {15}\) B.M.
\(μ_1–μ_2=0\)
So, the answer is \(2\).
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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.