The coordination numbers of Co and Al in [ Co ( Cl )( en )_2] Cl and K_3[ Al ( C_2 O_4)_3], respectively, are: (en = ethane-1, 2-diamine)

The coordination numbers of Co and Al in $\displaystyle \left[\mathrm{Co}(\mathrm{Cl})(\mathrm{en})_2\right] \mathrm{Cl}$ and $\displaystyle \mathrm{K}_3\left[\mathrm{Al}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]$, respectively, are : (en = ethane-$\displaystyle 1$, $\displaystyle 2$-diamine)