question_answer 3)

 Indicate the types of isomerism exhibited by the following complexes and draw the structures of these isomers : (a)K [Cr(H2O)2 (C2O4)2] (b) [Co(en)3] Cl3 (c) [Co(NH3)5(NO2)]  (NO3)2 (d) [Pt (NH3) (H2O) Cl2]

Answer:

(a) (i) Both geometrical and optical isomers can exist. (c)Isonisationisomers : [Co(NH3)5 (NO2)] (NO3)2 [Co(NH3)5 (NO3)] (NO2)(NO3) Linkage isomers : [Co(NH3)5 (NO2)] (NO3)2  [Co(NH3)5 (ONO)] (NO3)2 Octahedral complexes of the type [MA5B] do not show geometrical and optical isomerism. (d) Geometrical isomers (cis and trans)