Question

The type of isomerism exhibited by [Co(NH₃)₅(NO₂)]²⁺ complex is

(a) functional isomerism

(b) linkage isomerism

(c) hydrate isomerism

(d) coordination isomerism

Answer 1

Answer is : (b) linkage isomerism

The complex, [Co(NH₃)₅(NO₂)]²⁺ exhibits linkage isomerism as NO₂ group being an ambidentate ligand can bind to a metal atom either through N or O - atom and hence two different isomers are formed. These are [Co(ONO)(NH₃)₅]²⁺ and [Co(NO₂)(NH₃)₅]²⁺