Which of the following complex shows optical isomerism?

{[C d ({C N)}_{4}]}_{4}^{2 -}

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[C r (H_{2} {O)}_{3} {C l}_{3}] . {3 H}_{2} O

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{[Z n {(g l y)}_{2}]}_{2}^{\circ}

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{[N i {(d m g)}_{2}]}_{2}^{\circ}

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Solution

The correct option is C ${[Z n {(g l y)}_{2}]}_{2}^{\circ}$
Only tetrahedral complexes $[M (A B)_{2}]$ where
$^{'} A B^{'}$ is unsymmetrical bidentage ligands
show optical isomerisms
For ex :- $[Z n (g l y)_{2}], [C r (g l y)_{2}]$
In above question $[Z n (g l y)_{2}]$ will show
optical isomerism. Because gly is
an unsymmetrical bidentate ligand

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