Q.

Which of the following complex is homoleptic                              [2024]

1 [Ni(CN)4]2-  
2 [Ni(NH3)2Cl2]  
3 [Fe(NH3)4Cl2]+  
4 [Co(NH3)4Cl2]+  

Ans.

(1)

Complexes in which a metal is bound to only one kind of donor groups are known as homoleptic. Complexes in which a metal is bound to more than one kind of donor groups are known as heteroleptic. (1) is homoleptic. (2), (3) and (4) are heteroleptic.