Question

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

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.