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Q.
$\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$ and $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}$ differ in :
NTA AbhyasNTA Abhyas 2020Coordination Compounds
Solution:
$(\mu)_{ I }=\sqrt{4(4+2)}=24 BM$
$\mu_{ II }=0$
d-d transitions between $t _{2 g } \& e _{ g }$ orbitals are different due to $3 d^{6}$ (unpaired) & $3 d^{6}$ (Paired) configurations as shown i.e exhibit different colours.
