Coordination CompoundHard
Question
The complex K4[Zn(CN)4(O2)2] is oxidised into K2[Zn(CN)4(O2)2], then which of the following is correct ?
Options
A.Zn (II) is oxidised into Zn (IV)
B.Paramagnetic moment decreases
C.O - O bond length increases
D.Paramagnetic moment increases
Solution
K4[ZnII(CN)4(O2)2]4- 
K2[ZnII(CN)4(O2)2]2-.
O2- (has 1unpaired electron in antibonding MO)
O2 (has 2 unpaired electrons in antibonding MO).
So, paramagnetic moment increases.
K2[ZnII(CN)4(O2)2]2-.O2- (has 1unpaired electron in antibonding MO)
O2 (has 2 unpaired electrons in antibonding MO).So, paramagnetic moment increases.
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