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.