1. Tardigrade
  2. Question
  3. Chemistry
  4. What type of isomerism exists in the following pairs of complexes? (i) [Co(NH3)5NO3]SO4 and [Co(NH3)5SO4)NO3 (ii) [Co(en)(H2O )2Cl2]Cl and [Co(en)(H2O)Cl3]H2O

Q. What type of isomerism exists in the following pairs of complexes?
(i) and
(ii) and

 1554  197 Coordination Compounds Report Error

Solution:

(i) and shows ionisation isomerism. A ligand and an anion are exchanged.
In aqueous solution, dissociates to give sulphate ions which react with barium chloride to give white ppt of barium sulphate and the complex ions contain nitrate ligand.
In aqueous solution, dissociates to give nitrate ions and the complex ion contains sulphate ligand.
(ii) and shows hydrate isomerism. Water molecules are exchanged inside and outside coordination sphere.
The number of water molecules is different inside and outside the coordination sphere.
has two water molecules inside the coordination sphere and zero water molecules outside the coordination sphere.
has one water molecule inside coordination sphere and one water molecule outside coordination sphere.