What type of isomerism exists in the following pairs of complexes?
(i) $[C o (N H_{3})_{5} N O_{3}] S O_{4} a n d [C o (N H_{3})_{5} S O_{4}] N O_{3}$
(ii) $[C o (e n) (H_{2} O)_{2} C l_{2}] C l a n d [C o (e n) (H_{2} O) C l_{3}] H_{2} O$

(i) Ionisation (ii) Hydrate

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(i) Linkage (ii) Hydrate

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(i) Ionisation (ii) Linkage

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(i) Linkage (ii) Coordination

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Solution

The correct option is B (i) Ionisation (ii) Hydrate
(i) $[C o (N H_{3})_{5} N O_{3}] S O_{4} a n d [C o (N H_{3})_{5} S O_{4}] N O_{3}$ shows ionisation isomerism. A ligand and an anion are exchanged.
In aqueous solution, $[C o (N H_{3})_{5} N O_{3}] S O_{4}$ 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, $[C o (N H_{3})_{5} S O_{4}] N O_{3}$ dissociates to give nitrate ions and the complex ion contains sulphate ligand.

(ii) $[C o (e n) (H_{2} O)_{2} C l_{2}] C l a n d [C o (e n) (H_{2} O) C l_{3}] H_{2} O$ 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.
$[C o (e n) (H_{2} O)_{2} C l_{2}] C l$ has two water molecules inside the coordination sphere and zero water molecules outside the coordination sphere.
$[C o (e n) (H_{2} O) C l_{3}] H_{2} O$ has one water molecule inside coordination sphere and one water molecule outside coordination sphere.

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Similar questions

What kind of isomerism exists between $[C r (H_{2} O)_{6}] C l_{3} (v i o l e t)$ and $[C r (H_{2} O)_{5} C l] C l_{2} . H_{2} O (g r e y i s h - g r e e n)$ ?
(a) Linkage isomerism
(b) Solvate isomerism
(c) Ionisation isomerism
(d) Coordination isomerism

Due to the presence of ambidentate ligands coordination compounds show isomerism. Palladium complexes of the type $[P d (C_{6} H_{5})_{2} (S C N)_{2}]$ and $[P d (C_{6} H_{5})_{2} (N C S)_{2}]$ are
(a) linkage isomers
(b) coordination isomers
(c) ionisation isomers
(d) geometrical isomers

Q. Match the column I with column II and mark the appropriate choice.

	Column I (Complex)		Column II (Isomerism)
(A)	$[C o (N H_{3})_{6}] [C r (C N)_{6}]$	(i)	Geometrical isomerism
(B)	$[C o (e n)_{2} (N O_{2}) C l] B r$	(ii)	Optical isomerism
(C)	$[P t (e n)_{2} C l_{2}]$	(iii)	Coordination isomerism
(D)	$[C r (C N)_{2} (N H_{3})_{4}]^{2 +}$	(iv)	Linkage isomerism

Q. Match List-I with List-II:

List – I	List – II
(a) [Co(NH₃)₆] [Cr(CN)₆]	(i) Linkage isomerism
(b) [Co(NH₃)₃ (NO₂)₃]	(ii) Solvate isomerism
(c) [Cr(H₂O)₆]Cl₃	(iii) Coordination isomerism
(d) cis-[CrCl₂(ox)₂]^3-	(iv) Optical isomerism

Choose the correct answer from the options given below:

Q. Select the correct code about complex

[C r (N O_{2}) (N H_{3})_{5}] [Z n C l_{4}]

:
(I) IUPAC name of compound is pentaamminenitrito-N-chromium (III) tetrachlorozincate(II)
(II) It shows geometrical isomerism
(III) It shows linkage isomerism
(IV) It shows coordination isomerism.

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What type of isomerism exists in the following pairs of complexes? (i) [Co(NH3)5NO3]SO4and[Co(NH3)5SO4]NO3(ii)[Co(en)(H2O)2Cl2]Cland[Co(en)(H2O)Cl3]H2O

What type of isomerism exists in the following pairs of complexes?
(i) $[C o (N H_{3})_{5} N O_{3}] S O_{4} a n d [C o (N H_{3})_{5} S O_{4}] N O_{3}$
(ii) $[C o (e n) (H_{2} O)_{2} C l_{2}] C l a n d [C o (e n) (H_{2} O) C l_{3}] H_{2} O$