Isomerism

An ambidentate ligand is one that can coordinate to the central metal through two different atoms.
The $N O_{2}^{-}$ ion can coordinate either through the nitrogen atom ( $M - N O_{2}^{, nitro}$ ) or through the oxygen atom ( $M - ON O^{, nitrito}$ ).
Since these two complexes differ only in the atom through which the nitrite ligand is linked to the Cobalt, they are linkage isomers.

This easy difficulty chemistry question is from the chapter coordination compounds, covering the topic of isomerism. It appeared in the 2025 exam.

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Isomerism

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