Chemistry - Coordination Chemistry Question with Solution | TestHub

The type of the complex $\left[{\mathrm{MA}}_3{\mathrm{B}}_3\right]$ exhibit the geometrical isomerism fac-mer isomerism. When three ligands and the metal are in one plane, the isomer is said to be meridional, or mer.

$\left[\mathrm{Co}\right({\mathrm{NH}}_3{)}_3\left({\mathrm{NO}}_2{)}_3\right]$ can show facial and meridional isomerism.