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Factors affecting the stability of the complex, (G2 1.If the valency and…

- - - - Nature of the metal ion
        Group 1
        84580, 84640, 83099
        Size and charge of central metal ion :
        Increase in size of central metal ion decreases stability of complex, provided valency and ligands the same.
        Stability of complex increases as charge of central metal ion increases
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- - - - Example of class a (picky eater) : Li+, Ba2+, Mg2+, Al3+. Prefer to bond with hard ligands e.g oxygen, nitrogen, fluorine. These atoms are small and electronegative, meaning they like to pull electrons towards themselves, hence it creates a nice ionic bond with metal.
        
        G3(83268, 85649, 83324)
        
        class of the metal ion :
        
        Example of class b (adventurous eater) : Pd2+, Pt2+. They're not afraid to try "soft" ligands, which are bigger and less electronegative e.g P, S, or Cl. These atoms are more willing to share their electrons, which is exactly what the metals want. They can easily polarize the soft ligands and take some electron density for themselves.
        
        Example of borderline metals (open-minded) : Mn2+, Fe2+, Co2+. They're not too picky and will bond with both hard and soft ligands, depending on what's available. They're the chill eaters of the metal world.