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Also, I read somewhere that if a coordination compound contains at least one non-monodentate ligand, its considered a chelates. So I guess in a way its any coordination compound with a ligand, I think. And it also says that chelates are typically organic and an example of a chelate is the porphyrin ring and iron in hemoglobin.
joanneyseung22 wrote:Would anyone be able to explain the relationship between a polydentate and a chelate? The textbook says that "polydentate ligands can form chelates" but I'm not very clear on what that means.
This is what I found about chelates and polydentates on another post:
"Polydentate refers to a ligand that can bind the same transition metal more than once. Chelate refers to a ring like structure involving a transition metal and a ligand. These ring like structures usually result from a polydentate ligand binding the same transition metal. When EDTA is binding to a metal, the complex will be an example of chelate."
A chelate is formed when there are multiple polydentate anions bonding to a transition metal in a ring formation around it. Chelates are formed by polydentates, but not all polydentates contribute to the formation of chelates.
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