# 8.38 What can be inferred from the magnetic moment values of the following complex species ?Example                                    Magnetic Moment (BM)                                2.2                                          5.3                                            5.9

Magnetic moment is given as -
Putting the value on n = 1, 2, 3, 4, 5  (number of unpaired electrons in d-orbital)
we get the value of  are 1.732, 2.83, 3.87, 4.899, 5.92 respectively.

By comparing with our calculation we get the values n nearest to 1. It means, in above compound d-orbital has one unpaired electron(), which means  is astrong field ligand that cause force pairing of the electron.

After comparing with our calculation the nearest value of n = 4. Here iron is in +2 oxidation state ( configuration). So, we can say that  is a weak field ligand, which not cause any force pairing.

By observing we get the nearest value of n is 5. So, in this complex Manganese has  configuration. So, we conclude that   ligand does not cause any force pairing and hence it is a weak ligand.

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