Question

What is the total number of isomers including stereoisomers that have the formula $K_3\left[Co\right(CN{)}_6]$? (All are octahedral complexes with $C{o}^{3+}$ and ambidentate ligand $C{N}^{-}$)

Answer 1

$CN$, being an ambidentate ligand can bind in two possible places.

$\underset{\left(1\right)}{K_3\left[Co\right(C{N}_6\left)\right]}$

$\underset{\left(1\right)}{K_3\left[Co\right(CN{)}_5\left(NC\right)]}$

$\underset{\left(\text{2 GI}\right)}{K_3\left[Co\right(CN{)}_4\left(NC{)}_2\right]}$

$\underset{\left(\text{2 GI}\right)}{K_3\left[Co\right(CN{)}_3\left(NC{)}_3\right]}$

$\underset{(\text{2GI}}{K_3\left[Co\right(CN{)}_2\left(NC{)}_4\right]}$

$\underset{\left(1\right)}{K_3\left[Co\right(CN\left)\right(NC{)}_5]}$

$\underset{\left(1\right)}{K_3\left[Co\right(NC{)}_6]}$