Which type of isomerism is exhibited by coordination compounds that differ only in the ligand coordinated to the metal ion from inside versus outside the coordination sphere?

💡 Solution & Explanation

Ionization isomerism occurs when coordination compounds yield different ions in solution because an anionic ligand inside the coordination sphere swaps places with a counter ion outside. Linkage isomerism involves ambidentate ligands bonding through different donor atoms, which is distinct from counter ion exchange.