check this also https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_General_Chemistry_(Petrucci_et_al.)/24%3A_Complex_Ions_and_Coordination_Compounds/24.04%3A_Isomeris...
There are four types of structural isomerism:
In ionisation isomerism, the isomers result in different ions in solution although they have the same composition. This type of isome...