Page No 247: - Chapter 9 - Coordination Compounds - Intext Solutions - Ncert Solutions class 12 - Chemistry

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Question 9.3:

Indicate the types of isomerism exhibited by the following complexes and

draw the structures for these isomers:

1. K[Cr(H₂O)₂(C₂O₄)₂

2. [Co(en)₃]Cl₃

3. [Co(NH₃)₅(NO₂)](NO₃)₂

4. [Pt(NH₃)(H₂O)Cl₂]

Answer:

1. Both geometrical (cis-, trans-) isomers for   can exist. Also, optical isomers for cis-isomer exist.

Trans-isomer is optically inactive. On the other hand, cis-isomer is optically active.

(ii) Two optical isomers for   exist.

Two optical isomers are possible for this structure.

(iii) 

A pair of optical isomers:

It can also show linkage isomerism.

and

It can also show ionization isomerism.

(iv) Geometrical (cis-, trans-) isomers of   can exist.

Question 9.4:

Give evidence that [Co(NH₃)₅Cl]SO₄ and [Co(NH₃)₅SO₄]Cl are ionization isomers.

Answer:

When ionization isomers are dissolved in water, they ionize to give different ions. These ions then react differently with different reagents to give different products.