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What can be inferred from the magnetic moment values of the following camplex species? {:("Exampl e,,Magn etic Moment(BM)),(K_4[Mn(CN)_6],,2.2),([Fe(H_2O)_6],,5.3),(K_2(MnCl_4],,5.9):} |
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Answer» SOLUTION :The value of magnetic MOMENT `(mu)` in `(BM)` are as follows: When `n=1,mu=sqrt(3)=1.75` `n=2,mu=sqrt(8)=2.76` `n=3,mu=sqrt(15)=3.86` `n=4,mu=sqrt(24)=4.80` `n=5,mu=sqrt(35)=5.96` (a). `K_4(Mn(CN)_6]^(4-),Mn^(2+)=3d^(5),mu=2.2BM` `mu` value suggest that it has only ONE unpaired electron, which is due to the pairing of electrons by strong field `CN^(ɵ)` ligand.  (b). `[Fe(H_2O)_6]^(2+),Fe^(2+)=3d^(6),mu=5.3BM` `mu` value suggest that it has 4 unpaired electrons. Since `H_2O` is a weak field ligand, thus no pairing of d-electrons occurs.  (c). `K_2[MnCl_4]Mn^(2+)=3d^(5),mu=5.92BM` `mu` value suggests that it has 5 unpaired electrons. Since `Cl^(ɵ)` ion is a wak field ligand thus no pairing of d-electrons occurs. 
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