The Total solution for NCERT class 6-12
[Fe(H2O)6]3+ isstrongly paramagnetic whereas [Fe(CN)6]3− isweakly paramagnetic. Explain.
In both and , Fe exists in the +3 oxidation state i.e.,
SinceCN− is a strong field ligand, it causes thepairing of unpaired electrons. Therefore, there is only one unpaired electronleft in the d-orbital.
Therefore
Onthe other hand, H2O is a weak field ligand. Therefore, itcannot cause the pairing of electrons. This means that the number of unpairedelectrons is 5.
Therefore,
Thus, it is evident that is strongly paramagnetic, while is weakly paramagnetic