\(\left[ Ni \left( NH _{3}\right)_{2} Cl _{2}\right]\) does not show structural isomerism
\(\left[ Ni \left( NH _{3}\right)_{4}\left( H _{2} O \right)_{2}\right]^{2+} \&\left[ Pt \left( NH _{3}\right)_{2} Cl _{2}\right]\) show geometrical isomerism
\(\left[ Ni ( en )_{3}\right]^{2+}\) show optical isomerism
${\left[ {V\,{{\left( {CN} \right)}_6}} \right]^{4 - }}$ , ${\left[ {Fe\,{{\left( {CN} \right)}_6}} \right]^{4 - }}$ , ${\left[ {Ru\,{{\left( {N{H_3}} \right)}_6}} \right]^{3 + }}$ , અને ${\left[ {Cr\,{{\left( {N{H_3}} \right)}_6}} \right]^{2 + }}$