Grade 12Inorganic Chemistry
What is meant by chelating effect?
What is meant by chelating effect?
4 Answers
RAJU
The chelate effect describes the enhanced affinity of chelating ligands for a metal ion compared to the affinity of a collection of similar nonchelating (monodentate) ligands for the same metal.
PRAPULPODISHETTI
Approved Tutor Answer10 Years agoA bidentate (or) a poly dentate ligand is known as chelating ligand if on coordination it results in the formation of a closed (or) cyclic structure.Chelating ligands form more stable complexes than the monodentate ligands. This is called chelating effect.
RAKESH CHINDAM
Chelating effect:
[Cu(MeNH2)2]2+ (2) Cu2+ + en [Cu(en)]2+ (1)
The chelate effect describes the enhanced affinity of chelating ligands for a metal ion compared to the affinity of a collection of similar nonchelating (monodentate) ligands for the same metal.
Consider the two equilibria, in aqueous solution, between the copper(II) ion, Cu2+ and ethylenediamine (en) on the one hand and methylamine, MeNH2 on the other.
Cu2+ + 2 MeNH2 [Cu(MeNH2)2]2+ (2) Cu2+ + en [Cu(en)]2+ (1) In (1) the bidentate ligand ethylenediamine forms a chelate complex with the copper ion. Chelation results in the formation of a five-membered CuC2N2 ring. In (2) the bidentate ligand is replaced by two monodentate methylamine ligands of approximately the same donor power, meaning that the enthalpy of formation of Cu—N bonds is approximately the same in the two reactions.
E.Nandhini ketha
The chelate effect has the enhanced affinity of chelating ligands for a metal ion compared to the affinity of a collection of similar non-chelating ligands for the same metal.
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