This presentation is helpfull in understanding thermodynamic and kinetic stability.

1. Thermodynamic and kinetic stability
of metal complexes, Part 1, Types of
stability, Thermodynamic stability

3. Thermodynamic stability

5. Kfor and Kdiss for some complex ions

6. Stepwise formation constant

7. Overall formation constant

8. Relationship between stepwise and overall
stability constant

9. Relationship between stepwise and overall
stability constant

11. K4

12. [Fe(H2O)6]2+
+ bpy
K1
[Fe(H2O)4(bpy)]2+
+ 2H2O
[Fe(H2O)4(bpy)]2+
+ bpy
K2
[Fe(H2O)2(bpy)2]2+
+ 2H2O
[Fe(H2O)2(bpy)2]2+
+ bpy
K3
[Fe(bpy)3]2+
+ 2H2O
K3 > K2
CFSE = -0.4Δo
CFSE = -2.4Δo