Select the most stable complex.

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Question

(D) The stability of coordination complexes is influenced by the chelate effect. $[Co(en)_3]^{3+}$ contains the bidentate ligand ethylenediamine $(en)

Vedclass · Accepted Answer

$[Co(en)_3]^{3+}$

Vedclass · Answer

(D) The stability of coordination complexes is influenced by the chelate effect. $[Co(en)_3]^{3+}$ contains the bidentate ligand ethylenediamine $(en)$,which forms stable five-membered rings with the central metal ion. Complexes containing polydentate ligands (chelating agents) are significantly more stable than those containing only monodentate ligands like $NH_3$ due to the increase in entropy upon chelation. Therefore,$[Co(en)_3]^{3+}$ is the most stable complex among the given options.

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