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  4. Arrange the following cyano complexes in decreasing order of their magnetic moment.

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Q. Arrange the following cyano complexes in decreasing order of their magnetic moment.

NTA AbhyasNTA Abhyas 2020Coordination Compounds

Solution:

$\left[ Cr ( CN )_{6}\right]^{3-} Cr ^{3+}$ in strong ligand field $= t _{2 g }^{3} e _{ g }^{0}=3$ unpaired electron

- $\left[ Mn ( CN )_{6}\right]^{3-} Mn ^{3+}$ in strong ligand field $= t _{2 g }^{4} e _{ g }^{0}=2$ unpaired electron

- $\left[ Fe ( CN )_{6}\right]^{3-} Fe ^{3+}$ in strong ligand field $= t _{2 g }^{5} e _{ g }^{0}=1$ unpaired electron

$\left[ Co ( CN )_{6}\right]^{3-} Co ^{3+}$ in strong ligand field $= t _{2 g }^{6} e _{ g }^{0}=0$ unpaired electron