Question

Name the type of isomerism exhibited by the following compounds. Also, draw their corresponding isomers.

(I) \( [\text{Co(NH}_3\text{)}_6][\text{Cr(CN)}_6] \)

(II) \( [\text{Co(en)}_3]^{3+} \)

(III) \( [\text{Co(NH}_3\text{)}_3(\text{NO}_2)_3] \)

Answer 1

(I) The complex \( [\text{Co(NH}_3\text{)}_6][\text{Cr(CN)}_6] \) demonstrates ionization isomerism, a phenomenon occurring when ligands are exchanged between the cation and anion, leading to distinct ions in solution.

(II) The complex \( [\text{Co(en)}_3]^{3+} \) displays linkage isomerism, attributed to the ethylenediamine (en) ligand's ability to coordinate through varied positions.

(III) The complex \( [\text{Co(NH}_3\text{)}_3(\text{NO}_2)_3] \) exhibits geometric isomerism, arising from the different possible spatial arrangements of ligands around the central metal ion.