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Question
Give evidence that [Co(NH3)5Cl]SO4 and [Co(NH3)5SO4]Cl are ionization isomers.
Solution
Ionization isomers dissolve in water to give different ions, hence giving different reactions with different reagents.
\[\ce{[Co(NH3)5Cl]SO4 + Ba^{2+} -> BaSO4_{(s)}}\]
\[\ce{[Co(NH3)5SO4]Cl + Ba^{2+} -> {No Reaction}}\]
\[\ce{[Co(NH3)5Cl]SO4 + Ag^+ -> {No Reaction}}\]
\[\ce{[Co(NH3)5SO4]Cl + Ag^+ -> AgCl_{(s)}}\]
Since the given complexes give different reactions with different reagents, hence they are ionization isomers.
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RELATED QUESTIONS
The complex ion `[Co(H_2O)_5 (ONO)]^(2+) `
(A) linkage isomer
(B) ionisation isomer
(C) co-ordination isomer
(D) geometrical isomer
What type of isomerism is shown by the complex [Co(NH3)6] [Cr(CN)6]?
What type of isomerism is exhibited by the complex `[Co(NH_3)_5Cl]SO_4`?
Which among the following is an ambidentate ligand?
Which of the following pair contains a complex salt and double salt respectively?
The compounds \[\ce{[CO(SO4)(NH3)5]Br}\] and \[\ce{[Co(SO4)(NH3)5]Cl}\] represent
What kind of isomerism exists between \[\ce{[Cr(H2O)6]Cl3}\] (violet) and \[\ce{[Cr(H2O)5Cl]Cl2 . H2O}\] (greyish-green)?
Which of the following complexes show linkage isomerism?
(i) \[\ce{[Co(NH3)5 (NO2)]^{2+}}\]
(ii) \[\ce{Co(H2O)5 CO]^{3+}}\]
(iii) \[\ce{[Cr(NH3)5 SCN]^{2+}}\]
(iv) \[\ce{Fe(en)2 Cl2]^+}\]
Name the type of isomerism when ambidentate ligands are attached to central metal ion. Give two examples of ambidentate ligands.
Match the complex species given in Column I with the possible isomerism given in Column II and assign the correct code:
| Column I (Complex species) | Column II (Isomerism) |
| A. \[\ce{[Co(NH3)4 Cl2]^+}\] | 1. optical |
| B. \[\ce{cis-[Co(en)2 Cl2]^+}\] | 2. ionisation |
| C. \[\ce{[Co(NH3)5 (NO2)]Cl2}\] | 3. coordination |
| D. \[\ce{[Co(NH3)6][Cr(CN)6]}\] | 4. geometrical |
| 5. linkage |
Assertion: Linkage isomerism arises in coordination compounds containing ambidentate ligand.
Reason: Ambidentate ligand has two different donor atoms
CoSO4Cl.5NH3 exists in two isomeric forms ‘A’ and ‘B’. Isomer ‘A’ reacts with AgNO3 to give white precipitate, but does not react with BaCl2. Isomer ‘B’ gives white precipitate with BaCl2 but does not react with AgNO3. Answer the following questions.
- Identify ‘A’ and ‘B’ and write their structural formulas.
- Name the type of isomerism involved.
- Give the IUPAC name of ‘A’ and ‘B’.
The diamagnetic species is:-
Which of the following compounds exhibits linkage isomerism?
The complex [Co(NH3)5(NO2)]Cl2 is red in colour. Give IUPAC the name of its linkage isomer.
Indicate the types of isomerism exhibited by the following complexes and draw the structures for this isomer:
Pt(NH3)(H2O)Cl2
