The complex which does not exhibit geometrica | vedclass

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(A) Geometrical isomerism is observed in coordination complexes where ligands can be arranged in different spatial positions relative to each other.Fo

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$[Co(NH_3)_5 Cl] Cl_2$

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(A) Geometrical isomerism is observed in coordination complexes where ligands can be arranged in different spatial positions relative to each other.For octahedral complexes of the type $[MA_5B]$,geometrical isomerism is not possible because all positions are equivalent relative to the unique ligand $B$.In the complex $[Co(NH_3)_5 Cl] Cl_2$,the coordination sphere is $[Co(NH_3)_5 Cl]^{2+}$,which is of the type $[MA_5B]$.Therefore,it does not exhibit geometrical isomerism.In contrast,$[Co(NH_3)_4 Cl_2]^+$ (type $[MA_4B_2]$),$[Co(NH_3)_3(NO_2)_3]$ (type $[MA_3B_3]$),and $[Co(en)_2 Cl_2]^+$ (type $[M(AA)_2B_2]$) all exhibit geometrical isomerism (cis-trans or fac-mer).

The complex which does not exhibit geometrical isomerism is

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