Question

Calculate the EAN of the following central metals in their respective complexes.
(a) $\left[Cu\right[N{H}_3{)}_4\left]\right(OH{)}_2$ (b) $K_4\left[Fe\right(CN{)}_6]$

Answer 1

(a) $\left[Cu\right[N{H}_3{)}_4\left]\right(OH{)}_2$
EAN $=Z-X+Y$
EAN $=29-2+8=35$
(b) $K_4\left[Fe\right(CN{)}_6]$
EAN $=Z-X+Y$
EAN $=26-2+12=36$
Here, $Z=$ Atomic number of metal
$X=$ Number of electrons lost during the formation of the metal ion from its atom
$Y=$ Number of electrons donated by ligands.