Which complex compound is most stable?

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(D) The stability of coordination complexes is significantly enhanced by the chelate effect,which occurs when polydentate ligands (chelating agents) f

Vedclass · Accepted Answer

$[CoCl_2(en)_2]NO_3$

Vedclass · Answer

(D) The stability of coordination complexes is significantly enhanced by the chelate effect,which occurs when polydentate ligands (chelating agents) form ring structures with the central metal ion.In the given options,the complex $[CoCl_2(en)_2]NO_3$ contains ethylenediamine $(en)$,which is a bidentate ligand.Bidentate ligands form more stable complexes compared to monodentate ligands like $NH_3$,$H_2O$,$Br^-$,or $NO_3^-$.Therefore,the complex containing the chelating ligand $(en)$ is the most stable.

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