Question:
The stabilisation of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species?
(i) [Fe(CO)5]
(ii) [Fe(CN)6]3–
(iii) [Fe(C2O4)3]3–
(iv) [Fe(H2O)6]3+
Solution:
Option (iii) is the answer.