Coordination CompoundHard
Question
Which of the following is/are paramagnetic ?
Options
A.[Fe(CN)6]4-
B.[Ni(CO)4]
C.[Ni(CN)4]2-
D.[CoF6]3-
Solution
(A) [Fe(CN)6]4- d6 
CN- is strong field lignad.
(B) [Ni(CO)4] d10
CO is strong field lignad.
(C) [Ni(CN)4]2- ; Ni2+ has 3d8 configuration and CN- is strong field lignad. So, complex is square planar and diamagnetic.
(D) [CoF6]3- d6
F- being weak field ligand does not allow pairing.
CN- is strong field lignad.(B) [Ni(CO)4] d10
CO is strong field lignad.(C) [Ni(CN)4]2- ; Ni2+ has 3d8 configuration and CN- is strong field lignad. So, complex is square planar and diamagnetic.
(D) [CoF6]3- d6
F- being weak field ligand does not allow pairing. Create a free account to view solution
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