Which of the following pairs of isomers is not correctly matched with its type of isomerism?

[C r (N H_{3})_{6}] [C r (C N)_{6}]

and

[C r (N H_{3})_{4} (C N)_{2}] [C r (N H_{3})_{2} (C N)_{4}]

- Coordination isomerism

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C o [(N H_{3})_{5} N O_{2}] C l_{2}

and

[C o (N H_{3})_{5} O N O] C l_{2}

- Linkage isomerism

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[C o (p y)_{2} (H_{2} O)_{2} C l_{2}] C l

and

[C o (p y)_{2} (H_{2} O) C l_{3}] H_{2} O

-Coordination isomerism

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[P t (N H_{3})_{4} B r_{2}] C l_{2}

and

[P t (N H_{3})_{4} C l_{2}] B r_{2}

-Ionisation isomerism

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Solution

The correct option is C $[C o (p y)_{2} (H_{2} O)_{2} C l_{2}] C l$ and $[C o (p y)_{2} (H_{2} O) C l_{3}] H_{2} O$ -Coordination isomerism
Water molecules are exchanged inside and outside coordination sphere. Number of water molecules is different inside and outside coordination sphere. These are called hydrate isomers.
(i) $[C o (p y)_{2} (H_{2} O)_{2} C l_{2}] C l$ has two water molecules inside coordination sphere and zero water molecules outside coordination sphere.
(ii) $[C o (p y)_{2} (H_{2} O) C l_{3}] H_{2} O$ has one water molecule inside coordination sphere and one water molecule outside coordination sphere.

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Q. Which one of the following pairs of isomers and types of isomerism are correctly matched?
(i)

[C o (N H_{3})_{5} (N O_{2})] C l_{2}

and

[C o (N H_{3})_{5} (O N O) C l_{2} . . . (L i n k a g e)

(ii)

[C u (N H_{3})_{4}] [P t C l_{4}]

and

[P t (N H_{3})_{4}] [C u C l_{4}] . . . (C o o r d i n a t i o n)

(iii)

[P t C l_{2} (N H_{3})_{4}] B r_{2}

and

[P t B r_{2} (N H_{3})_{4}] C l_{2} . . . (I o n i z a t i o n)

Select the correct answer using the codes given below:

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

Q. Draw the structural isomer of

[C o (N H_{3})_{5} N O_{2}] C l_{2}

and name the type of isomerism?

Q. Name the type of isomerism exhibited by the following isomers :

[C r (N H_{3})_{6}] [C o (C N_{6})]

and

[C o (N H_{3})_{6}] [C r (C N)_{6}]

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