Which of the following coordination compounds | vedclass

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(C) Optical isomerism is exhibited by coordination compounds that lack a plane of symmetry or a center of inversion (chiral molecules).$1$. $[Co(en)_3

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$[Co(NH_3)_3Cl_3]$

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(C) Optical isomerism is exhibited by coordination compounds that lack a plane of symmetry or a center of inversion (chiral molecules).$1$. $[Co(en)_3]^{3+}$: This is a tris-chelated complex of the type $[M(AA)_3]$,which is chiral and shows optical isomerism.$2$. $[Co(en)_2Cl_2]^{+}$: The cis-isomer of this complex lacks a plane of symmetry and is optically active.$3$. $[Co(NH_3)_3Cl_3]$: This complex exists in facial $(fac)$ and meridional $(mer)$ forms. Both the $fac$ and $mer$ isomers of $[Co(NH_3)_3Cl_3]$ possess planes of symmetry,making them achiral and optically inactive.$4$. $[Co(en)(NH_3)_2Cl_2]^{+}$: This complex can exist in chiral forms depending on the arrangement of ligands.Therefore,$[Co(NH_3)_3Cl_3]$ does not exhibit optical isomerism.

Which of the following coordination compounds does not exhibit optical isomerism?

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