Polydentate and its relationship to Chelates

[Alex_Lee_1K]

Hello,

Under the definition of a Chelate which is that it contains at least 1 polydentate ligand and forms a ring of atoms around the central ion, does that mean that all polydentate ligans have the possibility to become chelates?

thanks

[Rhea Jain 2I]

No, which is shown in problem 9C.7. The ligands need to be close enough to bond so they can form a ring with the same metal center for it to be a chelation complex. for 9C.7, a) and c) can't be chelation complexes, while b) can.