Which of the following complexes will show coordination isomerism?A) $\left\lbrack Ag\left( {NH}_{3}

Question

Which of the following complexes will show coordination isomerism?

A) $\left\lbrack Ag\left( {NH}_{3} \right)_{2} \right\rbrack\left\lbrack Ag(CN)_{2} \right\rbrack$

B) $\left\lbrack Co\left( {NH}_{3} \right)_{6} \right\rbrack\left\lbrack Cr(CN)_{6} \right\rbrack$

C) $\left\lbrack Co\left( {NH}_{3} \right)_{6} \right\rbrack\left\lbrack Co(CN)_{6} \right\rbrack$

D) $\left\lbrack Fe\left( {NH}_{3} \right)_{6} \right\rbrack\left\lbrack Co(CN)_{6} \right\rbrack$

E) $\left\lbrack Co\left( {NH}_{3} \right)_{6} \right\rbrack\left\lbrack Fe(CN)_{6} \right\rbrack$

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Accepted Answer

Sol. [Key Concept: Coordination isomerism needs both ions to be complex; $\lbrack Ag({NH}_{3})_{2}\rbrack\lbrack Ag(CN)_{2}\rbrack$ (same metal) does not show it.]Compound, $\left\lbrack Ag\left( {NH}_{3} \right)_{2} \right\rbrack\left\lbrack Ag(CN)_{2} \right\rbrack$ cannot show coordination isomerism. All other complexes (B, C , D and E$)$ will show co-ordination isomerism.

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