MEDIUMMCQ SINGLENEET ChemistryInorganic ChemistryCoordination compoundsValence Bond Theory

The correct order of magnetic moments (spin only) values in BM) among the following is (Atomic number: Mn = 25, Fe = 26, Co = 27)

A.[MnCl4]2–> [CoCl4]2–> [Fe(CN)6]4–✓ Correct

B.[MnCl4]2–> [Fe(CN)6]4–> [CoCl4]2–

C.[Fe(CN)6]4–> [MnCl4]2–> [CoCl4]2–

D.[Fe(CN)6]4–> [CoCl4]2– > [MnCl4]2–

Explanation

Magnetic moment is dependent on the number of unpaired electrons in the structure the charge of manganese is 2+ Mn and it has 5 unpaired electrons in its 3d orbital. The charge on Fe is 2+ Co and it has 3 unpaired electrons in its 3d orbital. The charge of manganese is 2+ Fe and it has 0 unpaired electrons in its 3d orbital. Hence, .. 4- 2- 2- 4 4 6 MnCl > CoCl > Fe CN is the correct option.

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