Chemistry - Coordination Chemistry Question with Solution | TestHub

To find the total number of five-membered rings in the $[\mathrm{Co}(\mathrm{EDTA}){]}^{-1}$ complex ion, we analyze the EDTA ligand. EDTA (ethylenediaminetetraacetate) is a hexadentate ligand. It forms five five-membered chelate rings with the central cobalt ion. Two rings are formed by the ethylenediamine backbone, and three are formed by the acetate arms.