ABSTRACT
When Alfred Warner published his 1893 landmark paper describing chelation, there was probably no thought regarding the implications or impact his observations would have on mineral nutrition. He wrote, “If we think of the metal ion as the center of the whole system, then we can most simply place the molecules bound to it at the corners of an octohedron.”1 He viewed the chelate molecule as the metal ion being bonded to two ligands with the metal ion being the closing member of each chelate ring.1
