Question

Which of the following complex ions can exhibit linkage isomerism?

• A. $\left[Ag\right(N{H}_3{)}_2{]}^{+}$
• B. $\left[Co\right(N{H}_3{)}_{5}N{O}_2{]}^{2+}$
• C. $\left[Pt\right(en\left)C{l}_2\right)]$
• D. $\left[Co\right(N{H}_3{)}_{5}Cl{]}^{2+}$

Answer 1

The correct option is B $\left[Co\right(N{H}_3{)}_{5}N{O}_2{]}^{2+}$

$N{O}_2/ONO$ is an ambidentate ligand which can bind with central metal ion either from $N$ or $O$.
Therefore, $\left[Co\right(N{H}_3{)}_{5}N{O}_2{]}^{2+}$ shows linkage isomerism. Its linkage isomer is $\left[Co\right(N{H}_3{)}_{5}ONO{]}^{2+}$.