Write IUPAC name of the complex ${\left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_4{\mathrm{Cl}}_2\right]}^{+}$. Draw structures of geometrical isomers for this complex.
OR
Using IUPAC norms write the formulae for the following:
(i) Pentaammine nitrito-o-cobalt (III) Chloride
(ii) Potassium tetracyanonickelate (II)