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Question

Chemistry Question on coordination compounds

The geometry of complex ion [Fe(CN)6]4[ {Fe(CN)_6}]^{4-} is

A

trigonal pyramidal

B

octahedral

C

square planar

D

tetrahedral.

Answer

octahedral

Explanation

Solution

[Fe(CN)6]4[ {Fe(CN)_6}]^{4-} Fe(26):3d64s2 {Fe(26)} : 3d^6\, 4s^2 Fe2+ {Fe^{2+}} CN {CN^-} being a strong field ligand causes pairing of electrons