The calculated spin-only magnetic moments (BM) of the anionic and cationic species of and , respectively are:
0 and 4.9
2.84 and 5.92
4.9 and 0
0 and 5.92
Atomic Number of Fe=26=[Ar]3d64s2
Fe2+=[Ar]3d6
H2O: weak field ligand:- No pairing of e-
CN:- strong field ligand:- Pairing of e- takes place
So, ans is 0 and 4.9
0 and 4.9
Option 2)2.84 and 5.92
Option 3)4.9 and 0
Option 4)0 and 5.92
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