Define ionisation isomerism, Chemistry

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Q. Define Ionisation Isomerism?

Ionisation Isomerism: when coordinated ions exchange positions with ions present in the lattice position, we get ionisation isomers. Thus compounds having the same chemical composition give different ions in solution For example, a compound [Co(NH3)5BrS04  which is violet in colour yields [co(NH3)5Br2+ and SO2-4ions in solution, whereas a red  isomer of the compound [co(NH3)5Br2produces [CO(NH3)5SO4+ and Br ions in  solution. Other examples are:

[Co(en)2(N02)CIlN02 and [Co(en) 2 (N02]CI

[Pt(NH3)5cI2IBr2 and [Pt(NH3)4Br2]Cl2 etc.


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