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CBSE - XII Science - Chemistry - Coordination Compounds

How to find a complex if its spin only magnetic moment of given BM is given???

Asked by ADITYASEN704 11th June 2016, 9:10 PM
Answered by Expert


Example: Take the complex [MnCl4]2- with spin magnetic moment 5.92BM.

Let us find out the geometry of the complex ion.

Coordination number = 4

So the complex can be tetrahedral or square planar.

But since the magnetic moment is 5.9 it should be tetrahedral in shaper instead of square planar because of the presence of five electrons in the d-orbital.


In [MnCl4]2- ion, Mn+2 ion undergoes sp3 hybridisation. It contains 5d-orbitals singly occupied. Hence it has high value of magnetic moment.

Answered by Expert 13th June 2016, 12:31 PM

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