Please also explain how you determine the stability of these compounds to do thi

Question

Please also explain how you determine the stability of these compounds to do this problem.

Metallic elements tend to act as Lewis acids and form com exes with a variety of Lewis bases. Since most elements are metals and almost it is important to understand these complexes Many biological molecules, such as the chlorophyll used by plants to harvest the energy of sunlight, are coordination compounds or compounds containing one or more metal complexes Arrange the complexes in order of decreasing stability. Rank from most stable to least stable. To rank items as equivalent, overlap them.

Explanation / Answer

Metal complexes formed from polydentate igand are more stable than complexes formed from mondentate

So find the complex which contain polydentate ligand, that complex is more stable

en : NH2CH2CH2NH2 , polydentate ligand

[Cu(en)3]2+ > [Co(en)(H2O)4]2+

Still we have two complexes with monodentate ligands

Stability of these complexes depends on the basicity of the monodentate ligand

NH3 is more basic than F-

Stability order is

[Cu(NH3)6]2+ > [NiF6]2+

Therefore, overall stability order is

[Cu(en)3]2+ > [Co(en)(H2O)4]2+ >[Cu(NH3)6]2+ > [NiF6]2+

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