Fe(NO2)3Cl3 and Fe(ONO)3Cl3 show linkage isomerism. This type of isomerism is shown by the complexes in which an ambidentate ligand is present. NO2−,SCN−,CN−etc are ambidentate ligand as each of them contain more than one donor site.
In the linkage isomerism, at a time only one donor atom of ligand is borded to metal atom and hence, arises linkage isomerism.