The complex formed by the reaction of copper II ions with ethylenediamine in a 1:2 stoichiometric ratio is called bis ethylenediamine copper II complex. Its chemical formula is [Cu en 2]^2+, where en represents ethylenediamine.The shape of this complex is square planar, as copper II complexes with d8 electron configuration tend to adopt this geometry. Regarding isomerism, since the ethylenediamine ligand is symmetrical, there are no geometrical isomers cis or trans for this complex. Additionally, there is no optical isomerism in this complex, as it does not have a non-superimposable mirror image it is not chiral .