Question

Which of the following complexes show linkage isomerism?

• A. [Co(NH\(_3\))\(_5\)Cl]\(^{2+}\) \hspace{1.6cm}
• B. [Co(NH\(_3\))\(_4\)Cl\(_2\)]Br\(_2\)
• C. [Co(H\(_2\)O)\(_6\)]\(^{3+}\) \hspace{2cm}
• D. [Co(NH\(_3\))\(_5\)(ONO)]\(^{2+}\)

Hint:

Linkage isomerism is common with ligands like nitrito (ONO), thiocyanate (SCN), and others, which can coordinate via different atoms.

Answer 1

The Correct Option is D

Linkage isomerism arises when a ligand can coordinate to a central metal atom through different donor atoms, yielding distinct isomers. In complex (D), the nitrito ligand (ONO) can coordinate via its nitrogen or an oxygen atom, demonstrating linkage isomerism. The remaining complexes do not exhibit this isomerism.